1
|
Loetzsch R, Beyer HF, Duval L, Spillmann U, Banaś D, Dergham P, Kröger FM, Glorius J, Grisenti RE, Guerra M, Gumberidze A, Heß R, Hillenbrand PM, Indelicato P, Jagodzinski P, Lamour E, Lorentz B, Litvinov S, Litvinov YA, Machado J, Paul N, Paulus GG, Petridis N, Santos JP, Scheidel M, Sidhu RS, Steck M, Steydli S, Szary K, Trotsenko S, Uschmann I, Weber G, Stöhlker T, Trassinelli M. Testing quantum electrodynamics in extreme fields using helium-like uranium. Nature 2024; 625:673-678. [PMID: 38267680 PMCID: PMC10808054 DOI: 10.1038/s41586-023-06910-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 11/28/2023] [Indexed: 01/26/2024]
Abstract
Quantum electrodynamics (QED), the quantum field theory that describes the interaction between light and matter, is commonly regarded as the best-tested quantum theory in modern physics. However, this claim is mostly based on extremely precise studies performed in the domain of relatively low field strengths and light atoms and ions1-6. In the realm of very strong electromagnetic fields such as in the heaviest highly charged ions (with nuclear charge Z ≫ 1), QED calculations enter a qualitatively different, non-perturbative regime. Yet, the corresponding experimental studies are very challenging, and theoretical predictions are only partially tested. Here we present an experiment sensitive to higher-order QED effects and electron-electron interactions in the high-Z regime. This is achieved by using a multi-reference method based on Doppler-tuned X-ray emission from stored relativistic uranium ions with different charge states. The energy of the 1s1/22p3/2 J = 2 → 1s1/22s1/2 J = 1 intrashell transition in the heaviest two-electron ion (U90+) is obtained with an accuracy of 37 ppm. Furthermore, a comparison of uranium ions with different numbers of bound electrons enables us to disentangle and to test separately the one-electron higher-order QED effects and the bound electron-electron interaction terms without the uncertainty related to the nuclear radius. Moreover, our experimental result can discriminate between several state-of-the-art theoretical approaches and provides an important benchmark for calculations in the strong-field domain.
Collapse
Affiliation(s)
- R Loetzsch
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany.
| | - H F Beyer
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - L Duval
- Laboratoire Kastler Brossel, Sorbonne Université, ENS-PSL Research University, Collège de France, CNRS, Paris, France
| | - U Spillmann
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - D Banaś
- Institute of Physics, Jan Kochanowski University, Kielce, Poland
| | - P Dergham
- Institut des NanoSciences de Paris, CNRS, Sorbonne Université, Paris, France
| | - F M Kröger
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Jena, Jena, Germany
| | - J Glorius
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - R E Grisenti
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - M Guerra
- Laboratory of Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Department of Physics, NOVA School of Science and Technology, NOVA University Lisbon, Caparica, Portugal
| | - A Gumberidze
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - R Heß
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - P-M Hillenbrand
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- I. Physikalisches Institut, Justus-Liebig-Universität, Giessen, Germany
| | - P Indelicato
- Laboratoire Kastler Brossel, Sorbonne Université, ENS-PSL Research University, Collège de France, CNRS, Paris, France
| | - P Jagodzinski
- Institute of Physics, Jan Kochanowski University, Kielce, Poland
| | - E Lamour
- Institut des NanoSciences de Paris, CNRS, Sorbonne Université, Paris, France
| | - B Lorentz
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - S Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - J Machado
- Laboratory of Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Department of Physics, NOVA School of Science and Technology, NOVA University Lisbon, Caparica, Portugal
| | - N Paul
- Laboratoire Kastler Brossel, Sorbonne Université, ENS-PSL Research University, Collège de France, CNRS, Paris, France
| | - G G Paulus
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany
- Helmholtz-Institut Jena, Jena, Germany
| | - N Petridis
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Institut für Kernphysik, Goethe-Universität, Frankfurt am Main, Germany
| | - J P Santos
- Laboratory of Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Department of Physics, NOVA School of Science and Technology, NOVA University Lisbon, Caparica, Portugal
| | - M Scheidel
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - R S Sidhu
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- School of Physics and Astronomy, The University of Edinburgh, Edinburgh, UK
| | - M Steck
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - S Steydli
- Institut des NanoSciences de Paris, CNRS, Sorbonne Université, Paris, France
| | - K Szary
- Institute of Physics, Jan Kochanowski University, Kielce, Poland
| | - S Trotsenko
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Jena, Jena, Germany
| | - I Uschmann
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany
| | - G Weber
- Helmholtz-Institut Jena, Jena, Germany
| | - Th Stöhlker
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany
- GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
- Helmholtz-Institut Jena, Jena, Germany
| | - M Trassinelli
- Institut des NanoSciences de Paris, CNRS, Sorbonne Université, Paris, France.
| |
Collapse
|
2
|
Nies L, Atanasov D, Athanasakis-Kaklamanakis M, Au M, Blaum K, Dobaczewski J, Hu BS, Holt JD, Karthein J, Kulikov I, Litvinov YA, Lunney D, Manea V, Miyagi T, Mougeot M, Schweikhard L, Schwenk A, Sieja K, Wienholtz F. Isomeric Excitation Energy for ^{99}In^{m} from Mass Spectrometry Reveals Constant Trend Next to Doubly Magic ^{100}Sn. Phys Rev Lett 2023; 131:022502. [PMID: 37505949 DOI: 10.1103/physrevlett.131.022502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 04/10/2023] [Accepted: 06/02/2023] [Indexed: 07/30/2023]
Abstract
The excitation energy of the 1/2^{-} isomer in ^{99}In at N=50 is measured to be 671(37) keV and the mass uncertainty of the 9/2^{+} ground state is significantly reduced using the ISOLTRAP mass spectrometer at ISOLDE/CERN. The measurements exploit a major improvement in the resolution of the multireflection time-of-flight mass spectrometer. The results reveal an intriguing constancy of the 1/2^{-} isomer excitation energies in neutron-deficient indium that persists down to the N=50 shell closure, even when all neutrons are removed from the valence shell. This trend is used to test large-scale shell model, ab initio, and density functional theory calculations. The models have difficulties describing both the isomer excitation energies and ground-state electromagnetic moments along the indium chain.
Collapse
Affiliation(s)
- L Nies
- European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
- Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany
| | - D Atanasov
- European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
| | - M Athanasakis-Kaklamanakis
- European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - M Au
- European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
- Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - J Dobaczewski
- School of Physics, Engineering and Technology, University of York, Heslington, York YO10 5DD, United Kingdom
- Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
| | - B S Hu
- TRIUMF, TRIUMF 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - J D Holt
- TRIUMF, TRIUMF 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics, McGill University, Montréal, Quebec H3A 2T8, Canada
| | - J Karthein
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - I Kulikov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - D Lunney
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - V Manea
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - T Miyagi
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - M Mougeot
- European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - L Schweikhard
- Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany
| | - A Schwenk
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - K Sieja
- IPHC, CNRS/IN2P3 et Université de Strasbourg, F-67037 Strasbourg, France
| | - F Wienholtz
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| |
Collapse
|
3
|
Wang M, Zhang YH, Zhou X, Zhou XH, Xu HS, Liu ML, Li JG, Niu YF, Huang WJ, Yuan Q, Zhang S, Xu FR, Litvinov YA, Blaum K, Meisel Z, Casten RF, Cakirli RB, Chen RJ, Deng HY, Fu CY, Ge WW, Li HF, Liao T, Litvinov SA, Shuai P, Shi JY, Song YN, Sun MZ, Wang Q, Xing YM, Xu X, Yan XL, Yang JC, Yuan YJ, Zeng Q, Zhang M. Mass Measurement of Upper fp-Shell N=Z-2 and N=Z-1 Nuclei and the Importance of Three-Nucleon Force along the N=Z Line. Phys Rev Lett 2023; 130:192501. [PMID: 37243656 DOI: 10.1103/physrevlett.130.192501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 03/01/2023] [Accepted: 03/17/2023] [Indexed: 05/29/2023]
Abstract
Using a novel method of isochronous mass spectrometry, the masses of ^{62}Ge, ^{64}As, ^{66}Se, and ^{70}Kr are measured for the first time, and the masses of ^{58}Zn, ^{61}Ga, ^{63}Ge, ^{65}As, ^{67}Se, ^{71}Kr, and ^{75}Sr are redetermined with improved accuracy. The new masses allow us to derive residual proton-neutron interactions (δV_{pn}) in the N=Z nuclei, which are found to decrease (increase) with increasing mass A for even-even (odd-odd) nuclei beyond Z=28. This bifurcation of δV_{pn} cannot be reproduced by the available mass models, nor is it consistent with expectations of a pseudo-SU(4) symmetry restoration in the fp shell. We performed ab initio calculations with a chiral three-nucleon force (3NF) included, which indicate the enhancement of the T=1 pn pairing over the T=0 pn pairing in this mass region, leading to the opposite evolving trends of δV_{pn} in even-even and odd-odd nuclei.
Collapse
Affiliation(s)
- M Wang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Y H Zhang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - X Zhou
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - X H Zhou
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - H S Xu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - M L Liu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - J G Li
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Y F Niu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
- Frontiers Science Center for Rare isotope, Lanzhou University, Lanzhou 730000, China
| | - W J Huang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Advanced Energy Science and Technology Guangdong Laboratory, Huizhou, 516007, China
| | - Q Yuan
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China
| | - S Zhang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China
| | - F R Xu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China
| | - Yu A Litvinov
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Z Meisel
- Institute of Nuclear and Particle Physics, Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
| | - R F Casten
- Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8124, USA
| | - R B Cakirli
- Department of Physics, Istanbul University, Istanbul 34134, Turkey
| | - R J Chen
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - H Y Deng
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - C Y Fu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - W W Ge
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - H F Li
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - T Liao
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - S A Litvinov
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - P Shuai
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - J Y Shi
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Y N Song
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - M Z Sun
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Q Wang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Y M Xing
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X Xu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X L Yan
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - J C Yang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Y J Yuan
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Q Zeng
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, China
| | - M Zhang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
4
|
Kaur S, Kanungo R, Horiuchi W, Hagen G, Holt JD, Hu BS, Miyagi T, Suzuki T, Ameil F, Atkinson J, Ayyad Y, Bagchi S, Cortina-Gil D, Dillmann I, Estradé A, Evdokimov A, Farinon F, Geissel H, Guastalla G, Janik R, Knöbel R, Kurcewicz J, Litvinov YA, Marta M, Mostazo M, Mukha I, Nociforo C, Ong HJ, Otsuka T, Pietri S, Prochazka A, Scheidenberger C, Sitar B, Strmen P, Takechi M, Tanaka J, Tanihata I, Terashima S, Vargas J, Weick H, Winfield JS. Proton Distribution Radii of ^{16-24}O: Signatures of New Shell Closures and Neutron Skin. Phys Rev Lett 2022; 129:142502. [PMID: 36240396 DOI: 10.1103/physrevlett.129.142502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/31/2022] [Accepted: 08/30/2022] [Indexed: 06/16/2023]
Abstract
The root mean square radii of the proton density distribution in ^{16-24}O derived from measurements of charge changing cross sections with a carbon target at ∼900A MeV together with the matter radii portray thick neutron skin for ^{22-24}O despite ^{22,24}O being doubly magic. Imprints of the shell closures at N=14 and 16 are reflected in local minima of their proton radii that provide evidence for the tensor interaction causing them. The radii agree with ab initio calculations employing the chiral NNLO_{sat} interaction, though skin thickness predictions are challenged. Shell model predictions agree well with the data.
Collapse
Affiliation(s)
- S Kaur
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
- Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - R Kanungo
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
- TRIUMF, Vancouver, British Columbia V6T 4A3, Canada
| | - W Horiuchi
- Department of Physics, Osaka Metropolitan University, Osaka 558-8585, Japan
- Nambu Yoichiro Institute of Theoretical and Experimental Physics (NITEP), Osaka Metropolitan University, Osaka 558-8585, Japan
- Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
| | - G Hagen
- TRIUMF, Vancouver, British Columbia V6T 4A3, Canada
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - J D Holt
- TRIUMF, Vancouver, British Columbia V6T 4A3, Canada
| | - B S Hu
- TRIUMF, Vancouver, British Columbia V6T 4A3, Canada
| | - T Miyagi
- Technische Universität Darmstadt, Department of Physics, 64289 Darmstadt, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - T Suzuki
- Department of Physics, Nihon University, Setagaya-ku, Tokyo 156-8550, Japan
| | - F Ameil
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J Atkinson
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
| | - Y Ayyad
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - S Bagchi
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - D Cortina-Gil
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - I Dillmann
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- Justus-Liebig University, 35392 Giessen, Germany
| | - A Estradé
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - A Evdokimov
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - F Farinon
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- Justus-Liebig University, 35392 Giessen, Germany
| | - G Guastalla
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - R Janik
- Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia
| | - R Knöbel
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J Kurcewicz
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - M Marta
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - M Mostazo
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - I Mukha
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - H J Ong
- RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan
| | - T Otsuka
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- RIKEN Nishina Center, Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Pietri
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - A Prochazka
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- Justus-Liebig University, 35392 Giessen, Germany
| | - B Sitar
- Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia
| | - P Strmen
- Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia
| | - M Takechi
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J Tanaka
- RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan
| | - I Tanihata
- RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan
- School of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, China
| | - S Terashima
- School of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, China
| | - J Vargas
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J S Winfield
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| |
Collapse
|
5
|
Li HF, Naimi S, Sprouse TM, Mumpower MR, Abe Y, Yamaguchi Y, Nagae D, Suzaki F, Wakasugi M, Arakawa H, Dou WB, Hamakawa D, Hosoi S, Inada Y, Kajiki D, Kobayashi T, Sakaue M, Yokoda Y, Yamaguchi T, Kagesawa R, Kamioka D, Moriguchi T, Mukai M, Ozawa A, Ota S, Kitamura N, Masuoka S, Michimasa S, Baba H, Fukuda N, Shimizu Y, Suzuki H, Takeda H, Ahn DS, Wang M, Fu CY, Wang Q, Suzuki S, Ge Z, Litvinov YA, Lorusso G, Walker PM, Podolyak Z, Uesaka T. First Application of Mass Measurements with the Rare-RI Ring Reveals the Solar r-Process Abundance Trend at A=122 and A=123. Phys Rev Lett 2022; 128:152701. [PMID: 35499908 DOI: 10.1103/physrevlett.128.152701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/31/2022] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
The Rare-RI Ring (R3) is a recently commissioned cyclotronlike storage ring mass spectrometer dedicated to mass measurements of exotic nuclei far from stability at Radioactive Isotope Beam Factory (RIBF) in RIKEN. The first application of mass measurement using the R3 mass spectrometer at RIBF is reported. Rare isotopes produced at RIBF-^{127}Sn, ^{126}In, ^{125}Cd, ^{124}Ag, ^{123}Pd-were injected in R3. Masses of ^{126}In, ^{125}Cd, and ^{123}Pd were measured whereby the mass uncertainty of ^{123}Pd was improved. This is the first reported measurement with a new storage ring mass spectrometry technique realized at a heavy-ion cyclotron and employing individual injection of the preidentified rare nuclei. The latter is essential for the future mass measurements of the rarest isotopes produced at RIBF. The impact of the new ^{123}Pd result on the solar r-process abundances in a neutron star merger event is investigated by performing reaction network calculations of 20 trajectories with varying electron fraction Y_{e}. It is found that the neutron capture cross section on ^{123}Pd increases by a factor of 2.2 and β-delayed neutron emission probability, P_{1 n}, of ^{123}Rh increases by 14%. The neutron capture cross section on ^{122}Pd decreases by a factor of 2.6 leading to pileup of material at A=122, thus reproducing the trend of the solar r-process abundances. The trend of the two-neutron separation energies (S_{2n}) was investigated for the Pd isotopic chain. The new mass measurement with improved uncertainty excludes large changes of the S_{2n} value at N=77. Such large increase of the S_{2n} values before N=82 was proposed as an alternative to the quenching of the N=82 shell gap to reproduce r-process abundances in the mass region of A=112-124.
Collapse
Affiliation(s)
- H F Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- Lanzhou University, Lanzhou 730000, People's Republic of China
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - S Naimi
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - T M Sprouse
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - M R Mumpower
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Y Abe
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Y Yamaguchi
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - D Nagae
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - F Suzaki
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - M Wakasugi
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - H Arakawa
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - W B Dou
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - D Hamakawa
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - S Hosoi
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - Y Inada
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - D Kajiki
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - T Kobayashi
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - M Sakaue
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - Y Yokoda
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - T Yamaguchi
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - R Kagesawa
- Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
| | - D Kamioka
- Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
| | - T Moriguchi
- Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
| | - M Mukai
- Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
| | - A Ozawa
- Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
| | - S Ota
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
| | - N Kitamura
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
| | - S Masuoka
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
| | - S Michimasa
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
| | - H Baba
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - N Fukuda
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Y Shimizu
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - H Suzuki
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - H Takeda
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - D S Ahn
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Center for Exotic Nuclear Studies, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - M Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - C Y Fu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Q Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - S Suzuki
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Z Ge
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - G Lorusso
- National Physical Laboratory, Teddington, TW11 0LW, United Kingdom
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - P M Walker
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - Zs Podolyak
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - T Uesaka
- Riken Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| |
Collapse
|
6
|
Walker PM, Hirayama Y, Lane GJ, Watanabe H, Dracoulis GD, Ahmed M, Brunet M, Hashimoto T, Ishizawa S, Kondev FG, Litvinov YA, Miyatake H, Moon JY, Mukai M, Niwase T, Park JH, Podolyák Z, Rosenbusch M, Schury P, Wada M, Watanabe XY, Liang WY, Xu FR. Properties of ^{187}Ta Revealed through Isomeric Decay. Phys Rev Lett 2020; 125:192505. [PMID: 33216598 DOI: 10.1103/physrevlett.125.192505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
Mass-separated ^{187}Ta_{114} in a high-spin isomeric state has been produced for the first time by multinucleon transfer reactions, employing an argon gas-stopping cell and laser ionization. Internal γ rays revealed a T_{1/2}=7.3±0.9 s isomer at 1778±1 keV, which decays through a rotational band with perturbations associated with the approach to a prolate-oblate shape transition. Model calculations show less influence from triaxiality compared to heavier elements in the same mass region. The isomer-decay reduced E2 hindrance factor f_{ν}=27±1 supports the interpretation that axial symmetry is approximately conserved.
Collapse
Affiliation(s)
- P M Walker
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - Y Hirayama
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - G J Lane
- Department of Nuclear Physics, RSPhys, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - H Watanabe
- School of Physics, and International Research Center for Nuclei and Particles in Cosmos, Beihang University, Beijing 100191, China
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - G D Dracoulis
- Department of Nuclear Physics, RSPhys, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - M Ahmed
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- University of Tsukuba, Tsukuba, Ibaraki 305-0006, Japan
| | - M Brunet
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - T Hashimoto
- Rare Isotope Science Project, Institute for Basic Science (IBS), Daejeon 305-811, Republic of Korea
| | - S Ishizawa
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
- Graduate School of Science and Engineering, Yamagata University, Yamagata 992-8510, Japan
| | - F G Kondev
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - H Miyatake
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - J Y Moon
- Rare Isotope Science Project, Institute for Basic Science (IBS), Daejeon 305-811, Republic of Korea
| | - M Mukai
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
- University of Tsukuba, Tsukuba, Ibaraki 305-0006, Japan
| | - T Niwase
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
- Department of Physics, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - J H Park
- Rare Isotope Science Project, Institute for Basic Science (IBS), Daejeon 305-811, Republic of Korea
| | - Zs Podolyák
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - M Rosenbusch
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - P Schury
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - M Wada
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- University of Tsukuba, Tsukuba, Ibaraki 305-0006, Japan
| | - X Y Watanabe
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - W Y Liang
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - F R Xu
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| |
Collapse
|
7
|
Sanjari MS, Dmytriiev D, Litvinov YA, Gumenyuk O, Hess R, Joseph R, Litvinov SA, Steck M, Stöhlker T. A 410 MHz resonant cavity pickup for heavy ion storage rings. Rev Sci Instrum 2020; 91:083303. [PMID: 32872954 DOI: 10.1063/5.0009094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 08/09/2020] [Indexed: 06/11/2023]
Abstract
An improved design of a longitudinally sensitive resonant Schottky cavity pickup for the heavy ion storage rings of the Facility for Antiproton and Ion Research in Europe (FAIR) project is reported. The new detector has a higher measured Q value of ∼3000 and a higher simulated shunt impedance of 473.3 kΩ. It is possible to vary the sensitivity of the cavity with a motorized mechanism by inserting a dissipative blade during the operation based on experimental needs. Apart from a lower price tag, the new design features a more robust and production-friendly mechanical structure suitable for a series production in the future FAIR project. The manufactured cavity was built temporarily into the experimental storage ring and had delivered its first results using stored heavy ion beams. The structure, simulation results, and performance of this cavity are presented in this work.
Collapse
Affiliation(s)
- M S Sanjari
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - D Dmytriiev
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - Yu A Litvinov
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - O Gumenyuk
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - R Hess
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - R Joseph
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - S A Litvinov
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - M Steck
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - Th Stöhlker
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| |
Collapse
|
8
|
Manea V, Karthein J, Atanasov D, Bender M, Blaum K, Cocolios TE, Eliseev S, Herlert A, Holt JD, Huang WJ, Litvinov YA, Lunney D, Menéndez J, Mougeot M, Neidherr D, Schweikhard L, Schwenk A, Simonis J, Welker A, Wienholtz F, Zuber K. First Glimpse of the N=82 Shell Closure below Z=50 from Masses of Neutron-Rich Cadmium Isotopes and Isomers. Phys Rev Lett 2020; 124:092502. [PMID: 32202869 DOI: 10.1103/physrevlett.124.092502] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 01/07/2020] [Indexed: 06/10/2023]
Abstract
We probe the N=82 nuclear shell closure by mass measurements of neutron-rich cadmium isotopes with the ISOLTRAP spectrometer at ISOLDE-CERN. The new mass of ^{132}Cd offers the first value of the N=82, two-neutron shell gap below Z=50 and confirms the phenomenon of mutually enhanced magicity at ^{132}Sn. Using the recently implemented phase-imaging ion-cyclotron-resonance method, the ordering of the low-lying isomers in ^{129}Cd and their energies are determined. The new experimental findings are used to test large-scale shell-model, mean-field, and beyond-mean-field calculations, as well as the ab initio valence-space in-medium similarity renormalization group.
Collapse
Affiliation(s)
- V Manea
- CERN, 1211 Geneva 23, Switzerland
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
- Instituut voor Kern-en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
| | - J Karthein
- CERN, 1211 Geneva 23, Switzerland
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - D Atanasov
- Technische Universität Dresden, 01069 Dresden, Germany
| | - M Bender
- IP2I Lyon, CNRS/IN2P3, Université de Lyon, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France
| | - K Blaum
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - T E Cocolios
- Instituut voor Kern-en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
| | - S Eliseev
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | | | - J D Holt
- TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada
| | - W J Huang
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91406 Orsay, France
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - D Lunney
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91406 Orsay, France
| | - J Menéndez
- Center for Nuclear Study, The University of Tokyo, 113-0033 Tokyo, Japan
- Department de Física Quàntica i Astrofísica, Universitat de Barcelona, 08028 Barcelona, Spain
| | - M Mougeot
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91406 Orsay, France
| | - D Neidherr
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - L Schweikhard
- Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany
| | - A Schwenk
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - J Simonis
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Institut für Kernphysik and PRISMA Cluster of Excellence, Johannes Gutenberg-Universität, 55099 Mainz, Germany
| | - A Welker
- CERN, 1211 Geneva 23, Switzerland
- Technische Universität Dresden, 01069 Dresden, Germany
| | - F Wienholtz
- CERN, 1211 Geneva 23, Switzerland
- Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany
| | - K Zuber
- Technische Universität Dresden, 01069 Dresden, Germany
| |
Collapse
|
9
|
Kostyleva D, Mukha I, Acosta L, Casarejos E, Chudoba V, Ciemny AA, Dominik W, Dueñas JA, Dunin V, Espino JM, Estradé A, Farinon F, Fomichev A, Geissel H, Gorshkov A, Grigorenko LV, Janas Z, Kamiński G, Kiselev O, Knöbel R, Krupko S, Kuich M, Litvinov YA, Marquinez-Durán G, Martel I, Mazzocchi C, Nociforo C, Ordúz AK, Pfützner M, Pietri S, Pomorski M, Prochazka A, Rymzhanova S, Sánchez-Benítez AM, Scheidenberger C, Simon H, Sitar B, Slepnev R, Stanoiu M, Strmen P, Szarka I, Takechi M, Tanaka YK, Weick H, Winkler M, Winfield JS, Xu X, Zhukov MV. Towards the Limits of Existence of Nuclear Structure: Observation and First Spectroscopy of the Isotope ^{31}K by Measuring Its Three-Proton Decay. Phys Rev Lett 2019; 123:092502. [PMID: 31524489 DOI: 10.1103/physrevlett.123.092502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 06/28/2019] [Indexed: 06/10/2023]
Abstract
The most remote isotope from the proton dripline (by 4 atomic mass units) has been observed: ^{31}K. It is unbound with respect to three-proton (3p) emission, and its decays have been detected in flight by measuring the trajectories of all decay products using microstrip detectors. The 3p emission processes have been studied by the means of angular correlations of ^{28}S+3p and the respective decay vertices. The energies of the previously unknown ground and excited states of ^{31}K have been determined. This provides its 3p separation energy value S_{3p} of -4.6(2) MeV. Upper half-life limits of 10 ps of the observed ^{31}K states have been derived from distributions of the measured decay vertices.
Collapse
Affiliation(s)
- D Kostyleva
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - I Mukha
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - L Acosta
- INFN, Laboratori Nazionali del Sud, Via S. Sofía, 95123 Catania, Italy
- Instituto de Física, Universidad Nacional Autónoma de México, México, Distrito Federal 01000, Mexico
| | | | - V Chudoba
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
- Institute of Physics, Silesian University Opava, 74601 Opava, Czech Republic
| | - A A Ciemny
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - W Dominik
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - J A Dueñas
- Departamento de Ingenieria Electrica y Centro de Estudios Avanzados en Fisica, Matemáticas y Computación, Universidad de Huelva, 21071 Huelva, Spain
| | - V Dunin
- Veksler and Baldin Laboratory of High Energy Physics, JINR, 141980 Dubna, Russia
| | - J M Espino
- Department of Atomic, Molecular and Nuclear Physics, University of Seville, 41012 Seville, Spain
| | - A Estradé
- University of Edinburgh, EH1 1HT Edinburgh, United Kingdom
| | - F Farinon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - A Fomichev
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - A Gorshkov
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - L V Grigorenko
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
- National Research Nuclear University "MEPhI," 115409 Moscow, Russia
- National Research Centre "Kurchatov Institute," Kurchatov square 1, 123182 Moscow, Russia
| | - Z Janas
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - G Kamiński
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
- Heavy Ion Laboratory, University of Warsaw, 02-093 Warszawa, Poland
| | - O Kiselev
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - R Knöbel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - S Krupko
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - M Kuich
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
- Faculty of Physics, Warsaw University of Technology, 00-662 Warszawa, Poland
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - G Marquinez-Durán
- Department of Applied Physics, University of Huelva, 21071 Huelva, Spain
| | - I Martel
- Department of Physics, University of Liverpool, Liverpool L69 9ZE, United Kingdom
| | - C Mazzocchi
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - A K Ordúz
- Grand Accélérateur National d'Ions Lourds - GANIL, Bd Henri Becquerel, 14076 Caen, France
| | - M Pfützner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - S Pietri
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - M Pomorski
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - A Prochazka
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - S Rymzhanova
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - A M Sánchez-Benítez
- Centro de Estudios Avanzados en Física, Matemáticas y Computación (CEAFMC), Department of Integrated Sciences, University of Huelva, 21071 Huelva, Spain
| | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - H Simon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - B Sitar
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - R Slepnev
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - M Stanoiu
- IFIN-HH, Post Office Box MG-6, 077125 Bucharest, Romania
| | - P Strmen
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - I Szarka
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - M Takechi
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Y K Tanaka
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- University of Tokyo, 113-0033 Tokyo, Japan
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - M Winkler
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - J S Winfield
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - X Xu
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - M V Zhukov
- Department of Physics, Chalmers University of Technology, S-41296 Göteborg, Sweden
| |
Collapse
|
10
|
Chen XC, Litvinov YA, Wang M, Wang Q, Zhang YH. Denoising scheme based on singular-value decomposition for one-dimensional spectra and its application in precision storage-ring mass spectrometry. Phys Rev E 2019; 99:063320. [PMID: 31330675 DOI: 10.1103/physreve.99.063320] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Indexed: 11/07/2022]
Abstract
This work concerns noise reduction for one-dimensional spectra in the case that the signal is corrupted by an additive white noise. The proposed method starts with mapping the noisy spectrum to a partial circulant matrix. In virtue of singular-value decomposition of the matrix, components belonging to the signal are determined by inspecting the total variations of left singular vectors. Afterwards, a smoothed spectrum is reconstructed from the low-rank approximation of the matrix consisting of the signal components only. The denoising effect of the proposed method is shown to be highly competitive among other existing nonparametric methods, including moving average, wavelet shrinkage, and total variation. Furthermore, its applicable scenarios in precision storage-ring mass spectrometry are demonstrated to be rather diverse and appealing.
Collapse
Affiliation(s)
- X C Chen
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Yu A Litvinov
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.,Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Q Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Y H Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| |
Collapse
|
11
|
Glorius J, Langer C, Slavkovská Z, Bott L, Brandau C, Brückner B, Blaum K, Chen X, Dababneh S, Davinson T, Erbacher P, Fiebiger S, Gaßner T, Göbel K, Groothuis M, Gumberidze A, Gyürky G, Heil M, Hess R, Hensch R, Hillmann P, Hillenbrand PM, Hinrichs O, Jurado B, Kausch T, Khodaparast A, Kisselbach T, Klapper N, Kozhuharov C, Kurtulgil D, Lane G, Lederer-Woods C, Lestinsky M, Litvinov S, Litvinov YA, Löher B, Nolden F, Petridis N, Popp U, Rauscher T, Reed M, Reifarth R, Sanjari MS, Savran D, Simon H, Spillmann U, Steck M, Stöhlker T, Stumm J, Surzhykov A, Szücs T, Nguyen TT, Taremi Zadeh A, Thomas B, Torilov SY, Törnqvist H, Träger M, Trageser C, Trotsenko S, Varga L, Volknandt M, Weick H, Weigand M, Wolf C, Woods PJ, Xing YM. Approaching the Gamow Window with Stored Ions: Direct Measurement of ^{124}Xe(p,γ) in the ESR Storage Ring. Phys Rev Lett 2019; 122:092701. [PMID: 30932526 DOI: 10.1103/physrevlett.122.092701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/31/2019] [Indexed: 06/09/2023]
Abstract
We report the first measurement of low-energy proton-capture cross sections of ^{124}Xe in a heavy-ion storage ring. ^{124}Xe^{54+} ions of five different beam energies between 5.5 and 8 AMeV were stored to collide with a windowless hydrogen target. The ^{125}Cs reaction products were directly detected. The interaction energies are located on the high energy tail of the Gamow window for hot, explosive scenarios such as supernovae and x-ray binaries. The results serve as an important test of predicted astrophysical reaction rates in this mass range. Good agreement in the prediction of the astrophysically important proton width at low energy is found, with only a 30% difference between measurement and theory. Larger deviations are found above the neutron emission threshold, where also neutron and γ widths significantly impact the cross sections. The newly established experimental method is a very powerful tool to investigate nuclear reactions on rare ion beams at low center-of-mass energies.
Collapse
Affiliation(s)
- J Glorius
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - C Langer
- Goethe Universität, Frankfurt am Main, Germany
| | | | - L Bott
- Goethe Universität, Frankfurt am Main, Germany
| | - C Brandau
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- Justus-Liebig Universität, Gießen, Germany
| | - B Brückner
- Goethe Universität, Frankfurt am Main, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
| | - X Chen
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - S Dababneh
- Al-Balqa Applied University, Salt, Jordan
| | - T Davinson
- University of Edinburgh, Edinburgh, United Kingdom
| | - P Erbacher
- Goethe Universität, Frankfurt am Main, Germany
| | - S Fiebiger
- Goethe Universität, Frankfurt am Main, Germany
| | - T Gaßner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - K Göbel
- Goethe Universität, Frankfurt am Main, Germany
| | - M Groothuis
- Goethe Universität, Frankfurt am Main, Germany
| | - A Gumberidze
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - G Gyürky
- Institute for Nuclear Research (MTA Atomki), Debrecen, Hungary
| | - M Heil
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - R Hess
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - R Hensch
- Goethe Universität, Frankfurt am Main, Germany
| | - P Hillmann
- Goethe Universität, Frankfurt am Main, Germany
| | - P-M Hillenbrand
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - O Hinrichs
- Goethe Universität, Frankfurt am Main, Germany
| | - B Jurado
- CENBG, CNRS-IN2P3, Gradignan, France
| | - T Kausch
- Goethe Universität, Frankfurt am Main, Germany
| | - A Khodaparast
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- Goethe Universität, Frankfurt am Main, Germany
| | | | - N Klapper
- Goethe Universität, Frankfurt am Main, Germany
| | - C Kozhuharov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - D Kurtulgil
- Goethe Universität, Frankfurt am Main, Germany
| | - G Lane
- Australian National University, Canberra, Australia
| | | | - M Lestinsky
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - S Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - B Löher
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- Technische Universität Darmstadt, Darmstadt, Germany
| | - F Nolden
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - N Petridis
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - U Popp
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - T Rauscher
- Department of Physics, University of Basel, Switzerland
- Centre for Astrophysics Research, University of Hertfordshire, Hatfield, United Kingdom
| | - M Reed
- Australian National University, Canberra, Australia
| | - R Reifarth
- Goethe Universität, Frankfurt am Main, Germany
| | - M S Sanjari
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - D Savran
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - H Simon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - U Spillmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - M Steck
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - T Stöhlker
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- Helmholtz-Insitut Jena, Jena, Germany
| | - J Stumm
- Goethe Universität, Frankfurt am Main, Germany
| | - A Surzhykov
- Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
- Technische Universität Braunschweig, Braunschweig, Germany
| | - T Szücs
- Institute for Nuclear Research (MTA Atomki), Debrecen, Hungary
| | - T T Nguyen
- Goethe Universität, Frankfurt am Main, Germany
| | | | - B Thomas
- Goethe Universität, Frankfurt am Main, Germany
| | - S Yu Torilov
- St. Petersburg State University, St. Petersburg, Russia
| | - H Törnqvist
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- Technische Universität Darmstadt, Darmstadt, Germany
| | - M Träger
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - C Trageser
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- Justus-Liebig Universität, Gießen, Germany
| | - S Trotsenko
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - L Varga
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - M Volknandt
- Goethe Universität, Frankfurt am Main, Germany
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
| | - M Weigand
- Goethe Universität, Frankfurt am Main, Germany
| | - C Wolf
- Goethe Universität, Frankfurt am Main, Germany
| | - P J Woods
- University of Edinburgh, Edinburgh, United Kingdom
| | - Y M Xing
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| |
Collapse
|
12
|
Xu X, Zhang P, Shuai P, Chen RJ, Yan XL, Zhang YH, Wang M, Litvinov YA, Xu HS, Bao T, Chen XC, Chen H, Fu CY, Kubono S, Lam YH, Liu DW, Mao RS, Ma XW, Sun MZ, Tu XL, Xing YM, Yang JC, Yuan YJ, Zeng Q, Zhou X, Zhou XH, Zhan WL, Litvinov S, Blaum K, Audi G, Uesaka T, Yamaguchi Y, Yamaguchi T, Ozawa A, Sun BH, Sun Y, Dai AC, Xu FR. Identification of the Lowest T=2, J^{π}=0^{+} Isobaric Analog State in ^{52}Co and Its Impact on the Understanding of β-Decay Properties of ^{52}Ni. Phys Rev Lett 2016; 117:182503. [PMID: 27835000 DOI: 10.1103/physrevlett.117.182503] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Indexed: 06/06/2023]
Abstract
Masses of ^{52g,52m}Co were measured for the first time with an accuracy of ∼10 keV, an unprecedented precision reached for short-lived nuclei in the isochronous mass spectrometry. Combining our results with the previous β-γ measurements of ^{52}Ni, the T=2, J^{π}=0^{+} isobaric analog state (IAS) in ^{52}Co was newly assigned, questioning the conventional identification of IASs from the β-delayed proton emissions. Using our energy of the IAS in ^{52}Co, the masses of the T=2 multiplet fit well into the isobaric multiplet mass equation. We find that the IAS in ^{52}Co decays predominantly via γ transitions while the proton emission is negligibly small. According to our large-scale shell model calculations, this phenomenon has been interpreted to be due to very low isospin mixing in the IAS.
Collapse
Affiliation(s)
- X Xu
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - P Zhang
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- Graduate University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - P Shuai
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - R J Chen
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - X L Yan
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Y H Zhang
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - M Wang
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Yu A Litvinov
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - H S Xu
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - T Bao
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - X C Chen
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - H Chen
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- Graduate University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - C Y Fu
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- Graduate University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - S Kubono
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Y H Lam
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - D W Liu
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- Graduate University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - R S Mao
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - X W Ma
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - M Z Sun
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- Graduate University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X L Tu
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Y M Xing
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- Graduate University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - J C Yang
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Y J Yuan
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Q Zeng
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- Research Center for Hadron Physics, National Laboratory of Heavy Ion Accelerator Facility in Lanzhou and University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - X Zhou
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
- Graduate University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X H Zhou
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - W L Zhan
- Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - S Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - G Audi
- CSNSM, Univ Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - T Uesaka
- RIKEN Nishina Center, RIKEN, Saitama 351-0198, Japan
| | - Y Yamaguchi
- RIKEN Nishina Center, RIKEN, Saitama 351-0198, Japan
| | - T Yamaguchi
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - A Ozawa
- Insititute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
| | - B H Sun
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, People's Republic of China
| | - Y Sun
- Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - A C Dai
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China
| | - F R Xu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China
| |
Collapse
|
13
|
Kanungo R, Horiuchi W, Hagen G, Jansen GR, Navratil P, Ameil F, Atkinson J, Ayyad Y, Cortina-Gil D, Dillmann I, Estradé A, Evdokimov A, Farinon F, Geissel H, Guastalla G, Janik R, Kimura M, Knöbel R, Kurcewicz J, Litvinov YA, Marta M, Mostazo M, Mukha I, Nociforo C, Ong HJ, Pietri S, Prochazka A, Scheidenberger C, Sitar B, Strmen P, Suzuki Y, Takechi M, Tanaka J, Tanihata I, Terashima S, Vargas J, Weick H, Winfield JS. Proton Distribution Radii of ^{12-19}C Illuminate Features of Neutron Halos. Phys Rev Lett 2016; 117:102501. [PMID: 27636470 DOI: 10.1103/physrevlett.117.102501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Indexed: 06/06/2023]
Abstract
Proton radii of ^{12-19}C densities derived from first accurate charge changing cross section measurements at 900A MeV with a carbon target are reported. A thick neutron surface evolves from ∼0.5 fm in ^{15}C to ∼1 fm in ^{19}C. The halo radius in ^{19}C is found to be 6.4±0.7 fm as large as ^{11}Li. Ab initio calculations based on chiral nucleon-nucleon and three-nucleon forces reproduce the radii well.
Collapse
Affiliation(s)
- R Kanungo
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
| | - W Horiuchi
- Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
| | - G Hagen
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - G R Jansen
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- National Center for Computational Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 USA
| | - P Navratil
- TRIUMF, Vancouver, British Columbia V6T 4A3, Canada
| | - F Ameil
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J Atkinson
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
| | - Y Ayyad
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - D Cortina-Gil
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - I Dillmann
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - A Estradé
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - A Evdokimov
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - F Farinon
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- Justus-Liebig University, 35392 Giessen, Germany
| | - G Guastalla
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - R Janik
- Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia
| | - M Kimura
- Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
| | - R Knöbel
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J Kurcewicz
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - M Marta
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - M Mostazo
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - I Mukha
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - H J Ong
- RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan
| | - S Pietri
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - A Prochazka
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- Justus-Liebig University, 35392 Giessen, Germany
| | - B Sitar
- Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia
| | - P Strmen
- Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia
| | - Y Suzuki
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- Department of Physics, Niigata University, Niigata 950-2181, Japan
| | - M Takechi
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J Tanaka
- RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan
| | - I Tanihata
- RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan
- School of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, People's Republic of China
| | - S Terashima
- School of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, People's Republic of China
| | - J Vargas
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J S Winfield
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| |
Collapse
|
14
|
Caballero-Folch R, Domingo-Pardo C, Agramunt J, Algora A, Ameil F, Arcones A, Ayyad Y, Benlliure J, Borzov IN, Bowry M, Calviño F, Cano-Ott D, Cortés G, Davinson T, Dillmann I, Estrade A, Evdokimov A, Faestermann T, Farinon F, Galaviz D, García AR, Geissel H, Gelletly W, Gernhäuser R, Gómez-Hornillos MB, Guerrero C, Heil M, Hinke C, Knöbel R, Kojouharov I, Kurcewicz J, Kurz N, Litvinov YA, Maier L, Marganiec J, Marketin T, Marta M, Martínez T, Martínez-Pinedo G, Montes F, Mukha I, Napoli DR, Nociforo C, Paradela C, Pietri S, Podolyák Z, Prochazka A, Rice S, Riego A, Rubio B, Schaffner H, Scheidenberger C, Smith K, Sokol E, Steiger K, Sun B, Taín JL, Takechi M, Testov D, Weick H, Wilson E, Winfield JS, Wood R, Woods P, Yeremin A. First Measurement of Several β-Delayed Neutron Emitting Isotopes Beyond N=126. Phys Rev Lett 2016; 117:012501. [PMID: 27419564 DOI: 10.1103/physrevlett.117.012501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Indexed: 06/06/2023]
Abstract
The β-delayed neutron emission probabilities of neutron rich Hg and Tl nuclei have been measured together with β-decay half-lives for 20 isotopes of Au, Hg, Tl, Pb, and Bi in the mass region N≳126. These are the heaviest species where neutron emission has been observed so far. These measurements provide key information to evaluate the performance of nuclear microscopic and phenomenological models in reproducing the high-energy part of the β-decay strength distribution. This provides important constraints on global theoretical models currently used in r-process nucleosynthesis.
Collapse
Affiliation(s)
- R Caballero-Folch
- INTE-DFEN, Universitat Politècnica de Catalunya, E-08028 Barcelona, Spain
- TRIUMF, Vancouver, British Columbia V6T2A3, Canada
| | | | - J Agramunt
- IFIC, CSIC-University of Valencia, E-46071 Valencia, Spain
| | - A Algora
- IFIC, CSIC-University of Valencia, E-46071 Valencia, Spain
- Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen H-4001, Hungary
| | - F Ameil
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - A Arcones
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - Y Ayyad
- Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - J Benlliure
- Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - I N Borzov
- National Research Centre "Kurchatov Institute", 123182 Moscow, Russia
- Bogolubov Laboratory, Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - M Bowry
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - F Calviño
- INTE-DFEN, Universitat Politècnica de Catalunya, E-08028 Barcelona, Spain
| | | | - G Cortés
- INTE-DFEN, Universitat Politècnica de Catalunya, E-08028 Barcelona, Spain
| | - T Davinson
- University of Edinburgh, EH9 3JZ Edinburgh, United Kingdom
| | - I Dillmann
- TRIUMF, Vancouver, British Columbia V6T2A3, Canada
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Justus-Liebig Universität Giessen, D-35392 Giessen, Germany
| | - A Estrade
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- St. Mary's University, Halifax, B3H 3C3 Nova Scotia, Canada
| | - A Evdokimov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Justus-Liebig Universität Giessen, D-35392 Giessen, Germany
| | - T Faestermann
- Physik Department E12, Technische Universität München, D-85748 Garching, Germany
| | - F Farinon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - D Galaviz
- Centro de Fisica Nuclear da Universidade de Lisboa, 169-003 Lisboa, Portugal
| | | | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Justus-Liebig Universität Giessen, D-35392 Giessen, Germany
| | - W Gelletly
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - R Gernhäuser
- Physik Department E12, Technische Universität München, D-85748 Garching, Germany
| | | | - C Guerrero
- CERN Physics Department, CH-1211 Geneve, Switzerland
- Universidad de Sevilla, 41080 Seville, Spain
| | - M Heil
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - C Hinke
- Physik Department E12, Technische Universität München, D-85748 Garching, Germany
| | - R Knöbel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - I Kojouharov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - J Kurcewicz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - N Kurz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - L Maier
- Physik Department E12, Technische Universität München, D-85748 Garching, Germany
| | - J Marganiec
- ExtreMe Matter Institute, 64291 Darmstadt, Germany
| | - T Marketin
- Department of Physics, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
| | - M Marta
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Justus-Liebig Universität Giessen, D-35392 Giessen, Germany
| | | | - G Martínez-Pinedo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Institut für Kernphysik (Theoriezentrum), Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - F Montes
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - I Mukha
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - D R Napoli
- Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - C Paradela
- Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - S Pietri
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - Zs Podolyák
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - A Prochazka
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - S Rice
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - A Riego
- INTE-DFEN, Universitat Politècnica de Catalunya, E-08028 Barcelona, Spain
| | - B Rubio
- IFIC, CSIC-University of Valencia, E-46071 Valencia, Spain
| | - H Schaffner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - Ch Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Justus-Liebig Universität Giessen, D-35392 Giessen, Germany
| | - K Smith
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
- University of Notre Dame, South Bend, Indiana 46556, USA
- University of Tennessee, Knoxville, Knoxville, Tennessee 37996, USA
| | - E Sokol
- Flerov Laboratory, Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - K Steiger
- Physik Department E12, Technische Universität München, D-85748 Garching, Germany
| | - B Sun
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - J L Taín
- IFIC, CSIC-University of Valencia, E-46071 Valencia, Spain
| | - M Takechi
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - D Testov
- Flerov Laboratory, Joint Institute for Nuclear Research, 141980 Dubna, Russia
- Institut de Physique Nucléaire d'Orsay, Orsay F-91405, France
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - E Wilson
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - J S Winfield
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - R Wood
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - P Woods
- University of Edinburgh, EH9 3JZ Edinburgh, United Kingdom
| | - A Yeremin
- Flerov Laboratory, Joint Institute for Nuclear Research, 141980 Dubna, Russia
| |
Collapse
|
15
|
Atanasov D, Ascher P, Blaum K, Cakirli RB, Cocolios TE, George S, Goriely S, Herfurth F, Janka HT, Just O, Kowalska M, Kreim S, Kisler D, Litvinov YA, Lunney D, Manea V, Neidherr D, Rosenbusch M, Schweikhard L, Welker A, Wienholtz F, Wolf RN, Zuber K. Precision Mass Measurements of ^{129-131}Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process. Phys Rev Lett 2015; 115:232501. [PMID: 26684113 DOI: 10.1103/physrevlett.115.232501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Indexed: 06/05/2023]
Abstract
Masses adjacent to the classical waiting-point nuclide ^{130}Cd have been measured by using the Penning-trap spectrometer ISOLTRAP at ISOLDE/CERN. We find a significant deviation of over 400 keV from earlier values evaluated by using nuclear beta-decay data. The new measurements show the reduction of the N=82 shell gap below the doubly magic ^{132}Sn. The nucleosynthesis associated with the ejected wind from type-II supernovae as well as from compact object binary mergers is studied, by using state-of-the-art hydrodynamic simulations. We find a consistent and direct impact of the newly measured masses on the calculated abundances in the A=128-132 region and a reduction of the uncertainties from the precision mass input data.
Collapse
Affiliation(s)
- D Atanasov
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - P Ascher
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - R B Cakirli
- Department of Physics, University of Istanbul, 34134 Istanbul, Turkey
| | - T E Cocolios
- University of Manchester, Manchester M13 9PL, United Kingdom
| | - S George
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - S Goriely
- Institut d'Astronomie et d'Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, Belgium
| | - F Herfurth
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - H-T Janka
- Max-Planck-Institut für Astrophysik, Postfach 1317, 85741 Garching, Germany
| | - O Just
- Max-Planck-Institut für Astrophysik, Postfach 1317, 85741 Garching, Germany
| | | | - S Kreim
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- CERN, 1211 Geneva, Switzerland
| | - D Kisler
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Yu A Litvinov
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - D Lunney
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
| | - V Manea
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
| | - D Neidherr
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - M Rosenbusch
- Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany
| | - L Schweikhard
- Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany
| | - A Welker
- Technische Universität Dresden, 01069 Dresden, Germany
| | - F Wienholtz
- Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany
| | - R N Wolf
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - K Zuber
- Technische Universität Dresden, 01069 Dresden, Germany
| |
Collapse
|
16
|
Mukha I, Grigorenko LV, Xu X, Acosta L, Casarejos E, Ciemny AA, Dominik W, Duénas-Díaz J, Dunin V, Espino JM, Estradé A, Farinon F, Fomichev A, Geissel H, Golubkova TA, Gorshkov A, Janas Z, Kamiński G, Kiselev O, Knöbel R, Krupko S, Kuich M, Litvinov YA, Marquinez-Durán G, Martel I, Mazzocchi C, Nociforo C, Ordúz AK, Pfützner M, Pietri S, Pomorski M, Prochazka A, Rymzhanova S, Sánchez-Benítez AM, Scheidenberger C, Sharov P, Simon H, Sitar B, Slepnev R, Stanoiu M, Strmen P, Szarka I, Takechi M, Tanaka YK, Weick H, Winkler M, Winfield JS, Zhukov MV. Observation and Spectroscopy of New Proton-Unbound Isotopes ³⁰Ar and ²⁹Cl: An Interplay of Prompt Two-Proton and Sequential Decay. Phys Rev Lett 2015; 115:202501. [PMID: 26613434 DOI: 10.1103/physrevlett.115.202501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Indexed: 06/05/2023]
Abstract
Previously unknown isotopes (30)Ar and (29)Cl have been identified by measurement of the trajectories of their in-flight decay products (28)S+p+p and (28)S+p, respectively. The analysis of angular correlations of the fragments provided information on decay energies and the structure of the parent states. The ground states of (30)Ar and (29)Cl were found at 2.25(-0.10)(+0.15) and 1.8±0.1 MeV above the two- and one-proton thresholds, respectively. The lowest states in (30)Ar and (29)Cl point to a violation of isobaric symmetry in the structure of these unbound nuclei. The two-proton decay has been identified in a transition region between simultaneous two-proton and sequential proton emissions from the (30)Ar ground state, which is characterized by an interplay of three-body and two-body decay mechanisms. The first hint of a fine structure of the two-proton decay of (30)Ar*(2(+)) has been obtained by detecting two decay branches into the ground and first-excited states of the (28)S fragment.
Collapse
Affiliation(s)
- I Mukha
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- National Research Centre "Kurchatov Institute," Kurchatov square 1, 123182 Moscow, Russia
| | - L V Grigorenko
- National Research Centre "Kurchatov Institute," Kurchatov square 1, 123182 Moscow, Russia
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
- National Research Nuclear University "MEPhI," 115409 Moscow, Russia
| | - X Xu
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- II.Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
- School of Physics and Nuclear Energy Engineering, Beihang University, 100191 Beijing, China
| | - L Acosta
- INFN, Laboratori Nazionali del Sud, Via S. Sofía, 95123 Catania, Italy
- Instituto de Física, Universidad Nacional Autónoma de México, México, D.F. 01000, Mexico
| | | | - A A Ciemny
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - W Dominik
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - J Duénas-Díaz
- Department of Applied Physics, University of Huelva, 21071 Huelva, Spain
| | - V Dunin
- Veksler and Baldin Laboratory of High Energy Physics, JINR, 141980 Dubna, Russia
| | - J M Espino
- Department of Atomic, Molecular and Nuclear Physics, University of Seville, 41012 Seville, Spain
| | - A Estradé
- University of Edinburgh, EH1 1HT Edinburgh, United Kingdom
| | - F Farinon
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - A Fomichev
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- II.Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - T A Golubkova
- Advanced Educational and Scientific Center, Moscow State University, 121357 Moscow, Russia
| | - A Gorshkov
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - Z Janas
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - G Kamiński
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
- Institute of Nuclear Physics PAN, 31-342 Kraków, Poland
| | - O Kiselev
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - R Knöbel
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- II.Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - S Krupko
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - M Kuich
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
- Faculty of Physics, Warsaw University of Technology, 00-662 Warszawa, Poland
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - G Marquinez-Durán
- Department of Applied Physics, University of Huelva, 21071 Huelva, Spain
| | - I Martel
- Department of Applied Physics, University of Huelva, 21071 Huelva, Spain
| | - C Mazzocchi
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - A K Ordúz
- Department of Applied Physics, University of Huelva, 21071 Huelva, Spain
| | - M Pfützner
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - S Pietri
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - M Pomorski
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - A Prochazka
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - S Rymzhanova
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | | | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- II.Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - P Sharov
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - H Simon
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - B Sitar
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - R Slepnev
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - M Stanoiu
- IFIN-HH, Post Office Box MG-6, Bucharest, Romania
| | - P Strmen
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - I Szarka
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - M Takechi
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - Y K Tanaka
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- University of Tokyo, 113-0033 Tokyo, Japan
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - M Winkler
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - J S Winfield
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - M V Zhukov
- Fundamental Physics, Chalmers University of Technology, S-41296 Göteborg, Sweden
| |
Collapse
|
17
|
Estradé A, Kanungo R, Horiuchi W, Ameil F, Atkinson J, Ayyad Y, Cortina-Gil D, Dillmann I, Evdokimov A, Farinon F, Geissel H, Guastalla G, Janik R, Kimura M, Knöbel R, Kurcewicz J, Litvinov YA, Marta M, Mostazo M, Mukha I, Nociforo C, Ong HJ, Pietri S, Prochazka A, Scheidenberger C, Sitar B, Strmen P, Suzuki Y, Takechi M, Tanaka J, Tanihata I, Terashima S, Vargas J, Weick H, Winfield JS. Proton radii of (12-17)B define a thick neutron surface in ¹⁷B. Phys Rev Lett 2014; 113:132501. [PMID: 25302882 DOI: 10.1103/physrevlett.113.132501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Indexed: 06/04/2023]
Abstract
The first determination of radii of point proton distribution (proton radii) of (12-17)B from charge-changing cross sections (σ(CC)) measurements at the FRS, GSI, Darmstadt is reported. The proton radii are deduced from a finite-range Glauber model analysis of the σ(CC). The radii show an increase from ¹³B to ¹⁷B and are consistent with predictions from the antisymmetrized molecular dynamics model for the neutron-rich nuclei. The measurements show the existence of a thick neutron surface with neutron-proton radius difference of 0.51(0.11) fm in ¹⁷B.
Collapse
Affiliation(s)
- A Estradé
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3 H 3C3, Canada and GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - R Kanungo
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3 H 3C3, Canada
| | - W Horiuchi
- Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
| | - F Ameil
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J Atkinson
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3 H 3C3, Canada
| | - Y Ayyad
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - D Cortina-Gil
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - I Dillmann
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - A Evdokimov
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - F Farinon
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany and Justus-Liebig University, 35392 Giessen, Germany
| | - G Guastalla
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - R Janik
- Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia
| | - M Kimura
- Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
| | - R Knöbel
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J Kurcewicz
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - M Marta
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - M Mostazo
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - I Mukha
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - H J Ong
- RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan
| | - S Pietri
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - A Prochazka
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany and Justus-Liebig University, 35392 Giessen, Germany
| | - B Sitar
- Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia
| | - P Strmen
- Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia
| | - Y Suzuki
- Department of Physics, Niigata University, Niigata 950-2181, Japan and RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - M Takechi
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J Tanaka
- RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan
| | - I Tanihata
- RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan and School of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, People's Republic of China
| | - S Terashima
- School of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, People's Republic of China
| | - J Vargas
- Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - J S Winfield
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| |
Collapse
|
18
|
Tashenov S, Banaś D, Beyer H, Brandau C, Fritzsche S, Gumberidze A, Hagmann S, Hillenbrand PM, Jörg H, Kojouharov I, Kozhuharov C, Lestinsky M, Litvinov YA, Maiorova AV, Schaffner H, Shabaev VM, Spillmann U, Stöhlker T, Surzhykov A, Trotsenko S. Observation of coherence in the time-reversed relativistic photoelectric effect. Phys Rev Lett 2014; 113:113001. [PMID: 25259973 DOI: 10.1103/physrevlett.113.113001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Indexed: 06/03/2023]
Abstract
The photoelectric effect has been studied in the regime of hard x rays and strong Coulomb fields via its time-reversed process of radiative recombination (RR). In the experiment, the relativistic electrons recombined into the 2p_{3/2} excited state of hydrogenlike uranium ions, and both the RR x rays and the subsequently emitted characteristic x rays were detected in coincidence. This allowed us to observe the coherence between the magnetic substates in a highly charged ion and to identify the contribution of the spin-orbit interaction to the RR process.
Collapse
Affiliation(s)
- S Tashenov
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany
| | - D Banaś
- Institute of Physics, Jan Kochanowski University, 25-406 Kielce, Poland
| | - H Beyer
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - C Brandau
- ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany and FIAS Frankfurt Institute for Advanced Studies, 60438 Frankfurt am Main, Germany
| | - S Fritzsche
- Helmholtz-Institut Jena, 07743 Jena, Germany and Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - A Gumberidze
- ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany and FIAS Frankfurt Institute for Advanced Studies, 60438 Frankfurt am Main, Germany
| | - S Hagmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - P-M Hillenbrand
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - H Jörg
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany
| | - I Kojouharov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Ch Kozhuharov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - M Lestinsky
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Yu A Litvinov
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany and GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - A V Maiorova
- St. Petersburg State University, 198504 St. Petersburg, Russia
| | - H Schaffner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - V M Shabaev
- St. Petersburg State University, 198504 St. Petersburg, Russia
| | - U Spillmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Th Stöhlker
- Helmholtz-Institut Jena, 07743 Jena, Germany and Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - A Surzhykov
- Helmholtz-Institut Jena, 07743 Jena, Germany
| | - S Trotsenko
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany and Helmholtz-Institut Jena, 07743 Jena, Germany
| |
Collapse
|
19
|
Wamers F, Marganiec J, Aksouh F, Aksyutina Y, Álvarez-Pol H, Aumann T, Beceiro-Novo S, Boretzky K, Borge MJG, Chartier M, Chatillon A, Chulkov LV, Cortina-Gil D, Emling H, Ershova O, Fraile LM, Fynbo HOU, Galaviz D, Geissel H, Heil M, Hoffmann DHH, Johansson HT, Jonson B, Karagiannis C, Kiselev OA, Kratz JV, Kulessa R, Kurz N, Langer C, Lantz M, Le Bleis T, Lemmon R, Litvinov YA, Mahata K, Müntz C, Nilsson T, Nociforo C, Nyman G, Ott W, Panin V, Paschalis S, Perea A, Plag R, Reifarth R, Richter A, Rodriguez-Tajes C, Rossi D, Riisager K, Savran D, Schrieder G, Simon H, Stroth J, Sümmerer K, Tengblad O, Weick H, Wimmer C, Zhukov MV. First observation of the unbound nucleus 15Ne. Phys Rev Lett 2014; 112:132502. [PMID: 24745409 DOI: 10.1103/physrevlett.112.132502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Indexed: 06/03/2023]
Abstract
We report on the first observation of the unbound proton-rich nucleus 15Ne. Its ground state and first excited state were populated in two-neutron knockout reactions from a beam of 500 MeV/u 17Ne. The 15Ne ground state is found to be unbound by 2.522(66) MeV. The decay proceeds directly to 13O with simultaneous two-proton emission. No evidence for sequential decay via the energetically allowed 2- and 1- states in 14F is observed. The 15Ne ground state is shown to have a strong configuration with two protons in the (sd) shell around 13O with a 63(5)% (1s1/2)2 component.
Collapse
Affiliation(s)
- F Wamers
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany and GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and ExtreMe Matter Institute EMMI and Research Division GSI, D-64291 Darmstadt, Germany and Frankfurt Institute for Advanced Studies FIAS, D-60438 Frankfurt am Main, Germany
| | - J Marganiec
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany and GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and ExtreMe Matter Institute EMMI and Research Division GSI, D-64291 Darmstadt, Germany
| | - F Aksouh
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - Yu Aksyutina
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - H Álvarez-Pol
- Departamento de Física de Partículas, Universidade de Santiago de Compostela, ES-15782 Santiago de Compostela, Spain
| | - T Aumann
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany and GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - S Beceiro-Novo
- Departamento de Física de Partículas, Universidade de Santiago de Compostela, ES-15782 Santiago de Compostela, Spain
| | - K Boretzky
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M J G Borge
- Instituto de Estructura de la Materia, CSIC, ES-28006 Madrid, Spain
| | - M Chartier
- Department of Physics, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - A Chatillon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - L V Chulkov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and NRC Kurchatov Institute, RU-123182 Moscow, Russia
| | - D Cortina-Gil
- Departamento de Física de Partículas, Universidade de Santiago de Compostela, ES-15782 Santiago de Compostela, Spain
| | - H Emling
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - O Ershova
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - L M Fraile
- Department of Atomic, Molecular and Nuclear Physics, Universidad Complutense de Madrid, ES-28040 Madrid, Spain
| | - H O U Fynbo
- Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus, Denmark
| | - D Galaviz
- Instituto de Estructura de la Materia, CSIC, ES-28006 Madrid, Spain
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M Heil
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - D H H Hoffmann
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - H T Johansson
- Fundamental Fysik, Chalmers Tekniska Högskola, SE-41296 Göteborg, Sweden
| | - B Jonson
- Fundamental Fysik, Chalmers Tekniska Högskola, SE-41296 Göteborg, Sweden
| | - C Karagiannis
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - O A Kiselev
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - J V Kratz
- Institut für Kernchemie Johannes Gutenberg-Universität Mainz, D-55122 Mainz, Germany
| | - R Kulessa
- Instytut Fizyki, Uniwersytet Jagelloński, PL-30-059 Krakóv, Poland
| | - N Kurz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - C Langer
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - M Lantz
- Fundamental Fysik, Chalmers Tekniska Högskola, SE-41296 Göteborg, Sweden and Institutionen för fysik och astronomi, Uppsala Universitet, SE-75120 Uppsala, Sweden
| | - T Le Bleis
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Physik-Department E12, Technische Universität München, D-85748 Garching, Germany
| | - R Lemmon
- Nuclear Physics Group, STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, United Kingdom
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - K Mahata
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Nuclear Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085, India
| | - C Müntz
- Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - T Nilsson
- Fundamental Fysik, Chalmers Tekniska Högskola, SE-41296 Göteborg, Sweden
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - G Nyman
- Fundamental Fysik, Chalmers Tekniska Högskola, SE-41296 Göteborg, Sweden
| | - W Ott
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - V Panin
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany and GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - S Paschalis
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Department of Physics, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - A Perea
- Instituto de Estructura de la Materia, CSIC, ES-28006 Madrid, Spain
| | - R Plag
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - R Reifarth
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - A Richter
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - C Rodriguez-Tajes
- Departamento de Física de Partículas, Universidade de Santiago de Compostela, ES-15782 Santiago de Compostela, Spain
| | - D Rossi
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Kernchemie Johannes Gutenberg-Universität Mainz, D-55122 Mainz, Germany
| | - K Riisager
- Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus, Denmark
| | - D Savran
- ExtreMe Matter Institute EMMI and Research Division GSI, D-64291 Darmstadt, Germany and Frankfurt Institute for Advanced Studies FIAS, D-60438 Frankfurt am Main, Germany
| | - G Schrieder
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - H Simon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - J Stroth
- Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - K Sümmerer
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - O Tengblad
- Instituto de Estructura de la Materia, CSIC, ES-28006 Madrid, Spain
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - C Wimmer
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - M V Zhukov
- Fundamental Fysik, Chalmers Tekniska Högskola, SE-41296 Göteborg, Sweden
| |
Collapse
|
20
|
Rossi DM, Adrich P, Aksouh F, Alvarez-Pol H, Aumann T, Benlliure J, Böhmer M, Boretzky K, Casarejos E, Chartier M, Chatillon A, Cortina-Gil D, Datta Pramanik U, Emling H, Ershova O, Fernandez-Dominguez B, Geissel H, Gorska M, Heil M, Johansson HT, Junghans A, Kelic-Heil A, Kiselev O, Klimkiewicz A, Kratz JV, Krücken R, Kurz N, Labiche M, Le Bleis T, Lemmon R, Litvinov YA, Mahata K, Maierbeck P, Movsesyan A, Nilsson T, Nociforo C, Palit R, Paschalis S, Plag R, Reifarth R, Savran D, Scheit H, Simon H, Sümmerer K, Wagner A, Waluś W, Weick H, Winkler M. Measurement of the dipole polarizability of the unstable neutron-rich nucleus 68Ni. Phys Rev Lett 2013; 111:242503. [PMID: 24483648 DOI: 10.1103/physrevlett.111.242503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Indexed: 06/03/2023]
Abstract
The E1 strength distribution in 68Ni has been investigated using Coulomb excitation in inverse kinematics at the R3B-LAND setup and by measuring the invariant mass in the one- and two-neutron decay channels. The giant dipole resonance and a low-lying peak (pygmy dipole resonance) have been observed at 17.1(2) and 9.55(17) MeV, respectively. The measured dipole polarizability is compared to relativistic random phase approximation calculations yielding a neutron-skin thickness of 0.17(2) fm. A method and analysis applicable to neutron-rich nuclei has been developed, allowing for a precise determination of neutron skins in nuclei as a function of neutron excess.
Collapse
Affiliation(s)
- D M Rossi
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Kernchemie, Johannes Gutenberg-Universität, D-55128 Mainz, Germany
| | - P Adrich
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - F Aksouh
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - H Alvarez-Pol
- University of Santiago de Compostela, E-15705 Santiago de Compostela, Spain
| | - T Aumann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - J Benlliure
- University of Santiago de Compostela, E-15705 Santiago de Compostela, Spain
| | - M Böhmer
- Physik-Department E12, Technische Universität München, D-85748 Garching, Germany
| | - K Boretzky
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | | | - M Chartier
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - A Chatillon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - D Cortina-Gil
- University of Santiago de Compostela, E-15705 Santiago de Compostela, Spain
| | | | - H Emling
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - O Ershova
- Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - B Fernandez-Dominguez
- University of Santiago de Compostela, E-15705 Santiago de Compostela, Spain and University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M Gorska
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M Heil
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - H T Johansson
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - A Junghans
- Helmholtz-Zentrum Dresden-Rossendorf e.V., D-01328 Dresden, Germany
| | - A Kelic-Heil
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - O Kiselev
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Kernchemie, Johannes Gutenberg-Universität, D-55128 Mainz, Germany
| | - A Klimkiewicz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Jagiellonian University, PL-30-059 Krakow, Poland
| | - J V Kratz
- Institut für Kernchemie, Johannes Gutenberg-Universität, D-55128 Mainz, Germany
| | - R Krücken
- Physik-Department E12, Technische Universität München, D-85748 Garching, Germany
| | - N Kurz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M Labiche
- University of the West of Scotland, Paisley PA1 2BE, United Kingdom and STFC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
| | - T Le Bleis
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany and Institut Pluridisciplinaire Hubert Curien, F-67037 Strasbourg, France
| | - R Lemmon
- STFC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - K Mahata
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Bhabha Atomic Research Centre, Mumbai 400-085, India
| | - P Maierbeck
- Physik-Department E12, Technische Universität München, D-85748 Garching, Germany
| | - A Movsesyan
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - T Nilsson
- Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - R Palit
- Tata Institute of Fundamental Research, Mumbai 400-005, India
| | - S Paschalis
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany and University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - R Plag
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - R Reifarth
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - D Savran
- ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Frankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main, Germany
| | - H Scheit
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - H Simon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - K Sümmerer
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - A Wagner
- Helmholtz-Zentrum Dresden-Rossendorf e.V., D-01328 Dresden, Germany
| | - W Waluś
- Jagiellonian University, PL-30-059 Krakow, Poland
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M Winkler
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| |
Collapse
|
21
|
Chen L, Walker PM, Geissel H, Litvinov YA, Beckert K, Beller P, Bosch F, Boutin D, Caceres L, Carroll JJ, Cullen DM, Cullen IJ, Franzke B, Gerl J, Górska M, Jones GA, Kishada A, Knöbel R, Kozhuharov C, Kurcewicz J, Litvinov SA, Liu Z, Mandal S, Montes F, Münzenberg G, Nolden F, Ohtsubo T, Patyk Z, Plaß WR, Podolyák Z, Rigby S, Saito N, Saito T, Scheidenberger C, Simpson EC, Shindo M, Steck M, Sun B, Williams SJ, Weick H, Winkler M, Wollersheim HJ, Yamaguchi T. Direct observation of long-lived isomers in 212Bi. Phys Rev Lett 2013; 110:122502. [PMID: 25166798 DOI: 10.1103/physrevlett.110.122502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Indexed: 06/03/2023]
Abstract
Long-lived isomers in (212)Bi have been studied following (238)U projectile fragmentation at 670 MeV per nucleon. The fragmentation products were injected as highly charged ions into a storage ring, giving access to masses and half-lives. While the excitation energy of the first isomer of (212)Bi was confirmed, the second isomer was observed at 1478(30) keV, in contrast to the previously accepted value of >1910 keV. It was also found to have an extended Lorentz-corrected in-ring half-life >30 min, compared to 7.0(3) min for the neutral atom. Both the energy and half-life differences can be understood as being due a substantial, though previously unrecognized, internal decay branch for neutral atoms. Earlier shell-model calculations are now found to give good agreement with the isomer excitation energy. Furthermore, these and new calculations predict the existence of states at slightly higher energy that could facilitate isomer deexcitation studies.
Collapse
Affiliation(s)
- L Chen
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany and II Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany and Cyclotron Institute, Texas A & M University, Texas 77843, USA
| | - P M Walker
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany and II Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany and Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - K Beckert
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - P Beller
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - F Bosch
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - D Boutin
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - L Caceres
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - J J Carroll
- US Army Research Laboratory, Adelphi, Maryland 20783, USA
| | - D M Cullen
- Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
| | - I J Cullen
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - B Franzke
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - J Gerl
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - M Górska
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - G A Jones
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - A Kishada
- Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
| | - R Knöbel
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - C Kozhuharov
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - J Kurcewicz
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - S A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - Z Liu
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom and School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
| | - S Mandal
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - F Montes
- Michigan State University, East Lansing, Michigan 48824, USA
| | - G Münzenberg
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - F Nolden
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - T Ohtsubo
- Department of Physics, Niigata University, Niigata 950-2181, Japan
| | - Z Patyk
- National Centre for Nuclear Research, Hoa 69, 00-681 Warszawa, Poland
| | - W R Plaß
- II Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - Zs Podolyák
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - S Rigby
- Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
| | - N Saito
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - T Saito
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany and II Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - E C Simpson
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - M Shindo
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
| | - M Steck
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - B Sun
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - S J Williams
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - M Winkler
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - H-J Wollersheim
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - T Yamaguchi
- Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| |
Collapse
|
22
|
Zhang YH, Xu HS, Litvinov YA, Tu XL, Yan XL, Typel S, Blaum K, Wang M, Zhou XH, Sun Y, Brown BA, Yuan YJ, Xia JW, Yang JC, Audi G, Chen XC, Jia GB, Hu ZG, Ma XW, Mao RS, Mei B, Shuai P, Sun ZY, Wang ST, Xiao GQ, Xu X, Yamaguchi T, Yamaguchi Y, Zang YD, Zhao HW, Zhao TC, Zhang W, Zhan WL. Mass measurements of the neutron-deficient 41Ti, 45Cr, 49Fe, and 53Ni nuclides: first test of the isobaric multiplet mass equation in f p-shell nuclei. Phys Rev Lett 2012; 109:102501. [PMID: 23005283 DOI: 10.1103/physrevlett.109.102501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Indexed: 06/01/2023]
Abstract
Isochronous mass spectrometry has been applied to neutron-deficient 58Ni projectile fragments at the HIRFL-CSR facility in Lanzhou, China. Masses of a series of short-lived T(z)=-3/2 nuclides including 41Ti, 45Cr, 49Fe, and 53Ni have been measured with a precision of 20-40 keV. The new data enable us to test for the first time the isobaric multiplet mass equation (IMME) in fp-shell nuclei. We observe that the IMME is inconsistent with the generally accepted quadratic form for the A=53, T=3/2 quartet. We perform full space shell model calculations and compare them with the new experimental results.
Collapse
Affiliation(s)
- Y H Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Tu XL, Xu HS, Wang M, Zhang YH, Litvinov YA, Sun Y, Schatz H, Zhou XH, Yuan YJ, Xia JW, Audi G, Blaum K, Du CM, Geng P, Hu ZG, Huang WX, Jin SL, Liu LX, Liu Y, Ma X, Mao RS, Mei B, Shuai P, Sun ZY, Suzuki H, Tang SW, Wang JS, Wang ST, Xiao GQ, Xu X, Yamaguchi T, Yamaguchi Y, Yan XL, Yang JC, Ye RP, Zang YD, Zhao HW, Zhao TC, Zhang XY, Zhan WL. Direct mass measurements of short-lived A=2Z-1 nuclides (63)Ge, (65)As, (67)Se, and (71)Kr and their impact on nucleosynthesis in the rp process. Phys Rev Lett 2011; 106:112501. [PMID: 21469858 DOI: 10.1103/physrevlett.106.112501] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2011] [Indexed: 05/30/2023]
Abstract
Mass excesses of short-lived A=2Z-1 nuclei (63)Ge, (65)As, (67)Se, and (71)Kr have been directly measured to be -46,921(37), -46,937(85), -46,580(67), and -46,320(141) keV, respectively. The deduced proton separation energy of -90(85) keV for (65)As shows that this nucleus is only slightly proton unbound. X-ray burst model calculations with the new mass excess of (65)As suggest that the majority of the reaction flow passes through (64)Ge via proton capture, indicating that (64)Ge is not a significant rp-process waiting point.
Collapse
Affiliation(s)
- X L Tu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Reed MW, Cullen IJ, Walker PM, Litvinov YA, Blaum K, Bosch F, Brandau C, Carroll JJ, Cullen DM, Deo AY, Detwiller B, Dimopoulou C, Dracoulis GD, Farinon F, Geissel H, Haettner E, Heil M, Kempley RS, Knöbel R, Kozhuharov C, Kurcewicz J, Kuzminchuk N, Litvinov S, Liu Z, Mao R, Nociforo C, Nolden F, Plass WR, Prochazka A, Scheidenberger C, Steck M, Stöhlker T, Sun B, Swan TPD, Trees G, Weick H, Winckler N, Winkler M, Woods PJ, Yamaguchi T. Discovery of highly excited long-lived isomers in neutron-rich hafnium and tantalum isotopes through direct mass measurements. Phys Rev Lett 2010; 105:172501. [PMID: 21231037 DOI: 10.1103/physrevlett.105.172501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Indexed: 05/30/2023]
Abstract
A study of cooled ¹⁹⁷Au projectile-fragmentation products has been performed with a storage ring. This has enabled metastable nuclear excitations with energies up to 3 MeV, and half-lives extending to minutes or longer, to be identified in the neutron-rich nuclides ¹⁸³(,)¹⁸⁴(,)¹⁸⁶Hf and ¹⁸⁶(,)¹⁸⁷Ta. The results support the prediction of a strongly favored isomer region near neutron number 116.
Collapse
Affiliation(s)
- M W Reed
- Department of Physics, University of Surrey, Guildford, United Kingdom.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Chen L, Litvinov YA, Plass WR, Beckert K, Beller P, Bosch F, Boutin D, Caceres L, Cakirli RB, Carroll JJ, Casten RF, Chakrawarthy RS, Cullen DM, Cullen IJ, Franzke B, Geissel H, Gerl J, Górska M, Jones GA, Kishada A, Knöbel R, Kozhuharov C, Litvinov SA, Liu Z, Mandal S, Montes F, Münzenberg G, Nolden F, Ohtsubo T, Patyk Z, Podolyák Z, Propri R, Rigby S, Saito N, Saito T, Scheidenberger C, Shindo M, Steck M, Ugorowski P, Walker PM, Williams S, Weick H, Winkler M, Wollersheim HJ, Yamaguchi T. Schottky mass measurement of the 208Hg isotope: implication for the proton-neutron interaction strength around doubly magic 208Pb. Phys Rev Lett 2009; 102:122503. [PMID: 19392270 DOI: 10.1103/physrevlett.102.122503] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2008] [Indexed: 05/27/2023]
Abstract
Time-resolved Schottky mass spectrometry has been applied to uranium projectile fragments which yielded the mass value for the 208Hg (Z=80, N=128) isotope. The mass excess value of ME=-13 265(31) keV has been obtained, which has been used to determine the proton-neutron interaction strength in 210Pb, as a double difference of atomic masses. The results show a dramatic variation of the strength for lead isotopes when crossing the N=126 neutron shell closure, thus confirming the empirical predictions that this interaction strength is sensitive to the overlap of the wave functions of the last valence neutrons and protons.
Collapse
Affiliation(s)
- L Chen
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Litvinov YA, Bosch F, Geissel H, Kurcewicz J, Patyk Z, Winckler N, Batist L, Beckert K, Boutin D, Brandau C, Chen L, Dimopoulou C, Fabian B, Faestermann T, Fragner A, Grigorenko L, Haettner E, Hess S, Kienle P, Knöbel R, Kozhuharov C, Litvinov SA, Maier L, Mazzocco M, Montes F, Münzenberg G, Musumarra A, Nociforo C, Nolden F, Pfützner M, Plass WR, Prochazka A, Reda R, Reuschl R, Scheidenberger C, Steck M, Stöhlker T, Torilov S, Trassinelli M, Sun B, Weick H, Winkler M. Measurement of the beta+ and orbital electron-capture decay rates in fully ionized, hydrogenlike, and heliumlike 140Pr ions. Phys Rev Lett 2007; 99:262501. [PMID: 18233571 DOI: 10.1103/physrevlett.99.262501] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2007] [Indexed: 05/25/2023]
Abstract
We report on the first measurement of the beta+ and orbital electron-capture decay rates of 140Pr nuclei with the simplest electron configurations: bare nuclei, hydrogenlike, and heliumlike ions. The measured electron-capture decay constant of hydrogenlike 140Pr58+ ions is about 50% larger than that of heliumlike 140Pr57+ ions. Moreover, 140Pr ions with one bound electron decay faster than neutral 140Pr0+ atoms with 59 electrons. To explain this peculiar observation one has to take into account the conservation of the total angular momentum, since only particular spin orientations of the nucleus and of the captured electron can contribute to the allowed decay.
Collapse
Affiliation(s)
- Yu A Litvinov
- Gesellschaft für Schwerionenforschung GSI, Planckstrasse 1, 64291 Darmstadt, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Ohtsubo T, Bosch F, Geissel H, Maier L, Scheidenberger C, Attallah F, Beckert K, Beller P, Boutin D, Faestermann T, Franczak B, Franzke B, Hausmann M, Hellström M, Kaza E, Kienle P, Klepper O, Kluge HJ, Kozhuharov C, Litvinov YA, Matos M, Münzenberg G, Nolden F, Novikov YN, Portillo M, Radon T, Stadlmann J, Steck M, Stöhlker T, Sümmerer K, Takahashi K, Weick H, Winkler M, Yamaguchi T. Simultaneous measurement of beta- decay to bound and continuum electron states. Phys Rev Lett 2005; 95:052501. [PMID: 16090870 DOI: 10.1103/physrevlett.95.052501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2004] [Indexed: 05/03/2023]
Abstract
We report the first measurement of a ratio lambda(beta(b))/lambda(beta(c)) of bound-state ((lambda(beta(b))) and continuum-state (lambda(beta(c))) beta(-)-decay rates for the case of bare 207Tl81+ ions. These ions were produced at the GSI fragment separator FRS by projectile fragmentation of a 208Pb beam. After in-flight separation with the Brho-deltaE-Brho method, they were injected into the experimental storage-ring ESR at an energy of 400.5A MeV, stored, and electron cooled. The number of both the 207Tl81+ ions and their bound-state beta(-)-decay daughters, hydrogen-like 207Pb81+ ions, were measured as a function of storage time by recording their Schottky-noise intensities. The experimental result, lambda(beta(b))/lambda(beta(c)) = 0.188(18), is in very good agreement with the value of 0.171(1) obtained from theory employing spectra of allowed transitions.
Collapse
Affiliation(s)
- T Ohtsubo
- Gesellschaft für Schwerionenforschung (GSI), 64291 Darmstadt, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Litvinov YA, Bürvenich TJ, Geissel H, Novikov YN, Patyk Z, Scheidenberger C, Attallah F, Audi G, Beckert K, Bosch F, Falch M, Franzke B, Hausmann M, Kerscher T, Klepper O, Kluge HJ, Kozhuharov C, Löbner KEG, Madland DG, Maruhn JA, Münzenberg G, Nolden F, Radon T, Steck M, Typel S, Wollnik H. Isospin dependence in the odd-even staggering of nuclear binding energies. Phys Rev Lett 2005; 95:042501. [PMID: 16090802 DOI: 10.1103/physrevlett.95.042501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2005] [Indexed: 05/03/2023]
Abstract
The FRS-ESR facility at GSI provides unique conditions for precision measurements of large areas on the nuclear mass surface in a single experiment. Values for masses of 604 neutron-deficient nuclides (30 < or = Z < or = 92) were obtained with a typical uncertainty of 30 microu. The masses of 114 nuclides were determined for the first time. The odd-even staggering (OES) of nuclear masses was systematically investigated for isotopic chains between the proton shell closures at Z = 50 and Z = 82. The results were compared with predictions of modern nuclear models. The comparison revealed that the measured trend of OES is not reproduced by the theories fitted to masses only. The spectral pairing gaps extracted from models adjusted to both masses, and density related observables of nuclei agree better with the experimental data.
Collapse
Affiliation(s)
- Yu A Litvinov
- Gesellschaft für Schwerionenforschung GSI, Darmstadt, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|