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Zanon I, Clément E, Goasduff A, Menéndez J, Miyagi T, Assié M, Ciemała M, Flavigny F, Lemasson A, Matta A, Ramos D, Rejmund M, Achouri L, Ackermann D, Barrientos D, Beaumel D, Benzoni G, Boston AJ, Boston HC, Bottoni S, Bracco A, Brugnara D, de France G, de Sereville N, Delaunay F, Desesquelles P, Didierjean F, Domingo-Prato C, Dudouet J, Eberth J, Fernández D, Fougères C, Gadea A, Galtarossa F, Girard-Alcindor V, Gonzales V, Gottardo A, Hammache F, Harkness-Brennan LJ, Hess H, Judson DS, Jungclaus A, Kaşkaş A, Kim YH, Kuşoğlu A, Labiche M, Leblond S, Lenain C, Lenzi SM, Leoni S, Li H, Ljungvall J, Lois-Fuentes J, Lopez-Martens A, Maj A, Menegazzo R, Mengoni D, Michelagnoli C, Million B, Napoli DR, Nyberg J, Pasqualato G, Podolyak Z, Pullia A, Quintana B, Recchia F, Regueira-Castro D, Reiter P, Rezynkina K, Rojo JS, Salsac MD, Sanchis E, Şenyiğit M, Siciliano M, Sohler D, Stezowski O, Theisen C, Utepov A, Valiente-Dobón JJ, Verney D, Zielinska M. High-Precision Spectroscopy of ^{20}O Benchmarking Ab Initio Calculations in Light Nuclei. Phys Rev Lett 2023; 131:262501. [PMID: 38215380 DOI: 10.1103/physrevlett.131.262501] [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: 05/22/2023] [Revised: 09/18/2023] [Accepted: 11/21/2023] [Indexed: 01/14/2024]
Abstract
The excited states of unstable ^{20}O were investigated via γ-ray spectroscopy following the ^{19}O(d,p)^{20}O reaction at 8 AMeV. By exploiting the Doppler shift attenuation method, the lifetimes of the 2_{2}^{+} and 3_{1}^{+} states were firmly established. From the γ-ray branching and E2/M1 mixing ratios for transitions deexciting the 2_{2}^{+} and 3_{1}^{+} states, the B(E2) and B(M1) were determined. Various chiral effective field theory Hamiltonians, describing the nuclear properties beyond ground states, along with a standard USDB interaction, were compared with the experimentally obtained data. Such a comparison for a large set of γ-ray transition probabilities with the valence space in medium similarity renormalization group ab initio calculations was performed for the first time in a nucleus far from stability. It was shown that the ab initio approaches using chiral effective field theory forces are challenged by detailed high-precision spectroscopic properties of nuclei. The reduced transition probabilities were found to be a very constraining test of the performance of the ab initio models.
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Affiliation(s)
- I Zanon
- INFN Laboratori Nazionali di Legnaro, Legnaro, Italy
- Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Ferrara, Italy
| | - E Clément
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
| | - A Goasduff
- INFN Laboratori Nazionali di Legnaro, Legnaro, Italy
| | - J Menéndez
- Department of Quantum Physics and Astrophysics and Institute of Cosmos Sciences, University of Barcelona, Spain
| | - T Miyagi
- Department of Physics, Technische Universität Darmstadt, Darmstadt, Germany
- ExtreMe Matter Institute, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
- Max-Planck-Institut für Kernphysik, Heidelberg, Germany
| | - M Assié
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | | | - F Flavigny
- Université de Caen Normandie, ENSICAEN, CNRS/IN2P3, LPC Caen UMR6534, F-14000 Caen, France
| | - A Lemasson
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
| | - A Matta
- Université de Caen Normandie, ENSICAEN, CNRS/IN2P3, LPC Caen UMR6534, F-14000 Caen, France
| | - D Ramos
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
| | - M Rejmund
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
| | - L Achouri
- Université de Caen Normandie, ENSICAEN, CNRS/IN2P3, LPC Caen UMR6534, F-14000 Caen, France
| | - D Ackermann
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
| | | | - D Beaumel
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - G Benzoni
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - A J Boston
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool, United Kingdom
| | - H C Boston
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool, United Kingdom
| | - S Bottoni
- INFN Sezione di Milano, I-20133 Milano, Italy
- Dipartimento di Fisica, Università di Milano, Milano, Italy
| | - A Bracco
- INFN Sezione di Milano, I-20133 Milano, Italy
- Dipartimento di Fisica, Università di Milano, Milano, Italy
| | - D Brugnara
- INFN Laboratori Nazionali di Legnaro, Legnaro, Italy
- Dipartimento di Fisica, Università di Padova, Padova, Italy
| | - G de France
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
| | - N de Sereville
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - F Delaunay
- Université de Caen Normandie, ENSICAEN, CNRS/IN2P3, LPC Caen UMR6534, F-14000 Caen, France
| | - P Desesquelles
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - F Didierjean
- Université de Strasbourg, IPHC, Strasbourg, France
| | - C Domingo-Prato
- Instituto de Fisica Corpuscolar, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - J Dudouet
- Université de Lyon, Université Lyon-1, CNRS/IN2P3, UMR5822, IP2I, F-69622 Villeurbanne Cedex, France
| | - J Eberth
- Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
| | - D Fernández
- IGFAE and Department de Física de Partículas, Universidade of Santiago de Compostela, Santiago de Compostela, Spain
| | - C Fougères
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
| | - A Gadea
- Instituto de Fisica Corpuscolar, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - F Galtarossa
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - V Girard-Alcindor
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
| | - V Gonzales
- Departamento de Ingeniería Electrónica, Universitat de Valencia, Burjassot, Valencia, Spain
| | - A Gottardo
- INFN Laboratori Nazionali di Legnaro, Legnaro, Italy
| | - F Hammache
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | | | - H Hess
- Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
| | - D S Judson
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool, United Kingdom
| | - A Jungclaus
- Instituto de Estructura de la Materia, CSIC, Madrid, E-28006 Madrid, Spain
| | - A Kaşkaş
- Department of Physics, Faculty of Science, Ankara University, 06100 Besevler - Ankara, Turkey
| | - Y H Kim
- Institue Laue-Langevin, Grenoble, France
| | - A Kuşoğlu
- Department of Physics, Faculty of Science, Istanbul University, Vezneciler/Fatih, Istanbul, Turkey
| | - M Labiche
- STFC Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, United Kingdom
| | - S Leblond
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
| | - C Lenain
- Université de Caen Normandie, ENSICAEN, CNRS/IN2P3, LPC Caen UMR6534, F-14000 Caen, France
| | - S M Lenzi
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - S Leoni
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - H Li
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
| | - J Ljungvall
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - J Lois-Fuentes
- IGFAE and Department de Física de Partículas, Universidade of Santiago de Compostela, Santiago de Compostela, Spain
| | - A Lopez-Martens
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - A Maj
- The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Kraków, Poland
| | - R Menegazzo
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - D Mengoni
- Dipartimento di Fisica, Università di Padova, Padova, Italy
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - C Michelagnoli
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
- Institue Laue-Langevin, Grenoble, France
| | - B Million
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - D R Napoli
- INFN Laboratori Nazionali di Legnaro, Legnaro, Italy
| | - J Nyberg
- Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
| | - G Pasqualato
- Dipartimento di Fisica, Università di Padova, Padova, Italy
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - Zs Podolyak
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - A Pullia
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - B Quintana
- Laboratorio de Radiaciones Ionizantes, Departamento de Física Fundamental, Universidad de Salamanca, E-37008 Salamanca, Spain
| | - F Recchia
- Dipartimento di Fisica, Università di Padova, Padova, Italy
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - D Regueira-Castro
- IGFAE and Department de Física de Partículas, Universidade of Santiago de Compostela, Santiago de Compostela, Spain
| | - P Reiter
- Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
| | - K Rezynkina
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - J S Rojo
- Department of Physics, University of York, York, United Kingdom
| | - M D Salsac
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - E Sanchis
- Departamento de Ingeniería Electrónica, Universitat de Valencia, Burjassot, Valencia, Spain
| | - M Şenyiğit
- Department of Physics, Faculty of Science, Ankara University, 06100 Besevler - Ankara, Turkey
| | - M Siciliano
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - D Sohler
- Institute for Nuclear Research, Atomki, 4001 Debrecen, Hungary
| | - O Stezowski
- Université de Lyon, Université Lyon-1, CNRS/IN2P3, UMR5822, IP2I, F-69622 Villeurbanne Cedex, France
| | - Ch Theisen
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Utepov
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Caen, France
- Université de Caen Normandie, ENSICAEN, CNRS/IN2P3, LPC Caen UMR6534, F-14000 Caen, France
| | | | - D Verney
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - M Zielinska
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
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Lalanne L, Sorlin O, Poves A, Assié M, Hammache F, Koyama S, Suzuki D, Flavigny F, Girard-Alcindor V, Lemasson A, Matta A, Roger T, Beaumel D, Blumenfeld Y, Brown BA, Santos FDO, Delaunay F, de Séréville N, Franchoo S, Gibelin J, Guillot J, Kamalou O, Kitamura N, Lapoux V, Mauss B, Morfouace P, Pancin J, Saito TY, Stodel C, Thomas JC. N=16 Magicity Revealed at the Proton Drip Line through the Study of ^{35}Ca. Phys Rev Lett 2023; 131:092501. [PMID: 37721823 DOI: 10.1103/physrevlett.131.092501] [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: 02/28/2023] [Revised: 06/15/2023] [Accepted: 07/21/2023] [Indexed: 09/20/2023]
Abstract
The last proton bound calcium isotope ^{35}Ca has been studied for the first time, using the ^{37}Ca(p,t)^{35}Ca two neutron transfer reaction. The radioactive ^{37}Ca nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid hydrogen target CRYPTA, to produce tritons t that were detected in the MUST2 detector array, in coincidence with the heavy residues Ca or Ar. The atomic mass of ^{35}Ca and the energy of its first 3/2^{+} state are reported. A large N=16 gap of 4.61(11) MeV is deduced from the mass measurement, which together with other measured properties, makes ^{36}Ca a doubly magic nucleus. The N=16 shell gaps in ^{36}Ca and ^{24}O are of similar amplitude, at both edges of the valley of stability. This feature is discussed in terms of nuclear forces involved, within state-of-the-art shell model calculations. Even though the global agreement with data is quite convincing, the calculations underestimate the size of the N=16 gap in ^{36}Ca by 840 keV.
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Affiliation(s)
- L Lalanne
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - O Sorlin
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - A Poves
- Departamento de Física Teórica and IFT-UAM/CSIC, Universidad Autónoma de Madrid, E-2804 Madrid, Spain
| | - M Assié
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - F Hammache
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - S Koyama
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
- Department of Physics, The Unviversity of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - D Suzuki
- RIKEN Nishina Center, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
| | - F Flavigny
- Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
| | - V Girard-Alcindor
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - A Lemasson
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - A Matta
- Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
| | - T Roger
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - D Beaumel
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - Y Blumenfeld
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - B A Brown
- Department of Physics and Astronomy, National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - F De Oliveira Santos
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - F Delaunay
- Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
| | - N de Séréville
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - S Franchoo
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - J Gibelin
- Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
| | - J Guillot
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - O Kamalou
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - N Kitamura
- Center for Nuclear Study, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - V Lapoux
- CEA, Centre de Saclay, IRFU, Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
| | - B Mauss
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
- RIKEN Nishina Center, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
| | - P Morfouace
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - J Pancin
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - T Y Saito
- Department of Physics, The Unviversity of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - C Stodel
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - J-C Thomas
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
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Oliva A, Tumino A, Soic N, Prajapati M, Acosta L, Alba R, Barba F, Cherubini S, D’Agata G, Dell’Aquila D, Di Pietro A, Fernandez P, Figuera P, Galaviz Redondo D, Guardo L, Gulino M, Hammache F, Jelavic Malenica D, Kiliç A, La Cognata M, La Commara M, Lamia L, Lattuada D, Maiolino C, Manicò G, Mazzocco M, Milin M, Nanru M, Nurmukhanbetova A, Nurkic D, Palmerini S, Parascandolo T, Pierroutsakou D, Pizzone R, Popocovski R, Rapisarda G, Romano S, Santonocito D, Sergi M, Shotter A, Spartà R, Spiridon A, Trache L, Vukman N, Yamaguchi H. The 12C + 16 O fusion reaction in carbon burning: Study at energies of astrophysical interest using the Trojan Horse Method. EPJ Web Conf 2023. [DOI: 10.1051/epjconf/202327502010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The carbon-burning process in massive stars mainly occurs via the 12C +12 C. However, at temperatures higher than 109K and considering the increased abundance of 16O produced during the later stages of the heliumburning,the 12C+16O fusion can also become relevant. Moreover, 12C+16O also plays a role in the scenario of explosive carbon burning. Thus, the astrophysical energy region of interest ranges from 3 to 7.2 MeV in the center-of-mass frame. However, the various measurements of the cross-section available in the literature stop around 4 MeV, making extrapolation necessary. To solve this uncertainty and corroborate direct measurement we applied the Trojan Horse Method to three-body processes 16O(14N, α24Mg)2H and 16O(14N, p27Al)2H to study the 12C(16O, α)24Mg and 12C(16O, p)27Al reactions in their entire energy region of astrophysical interest. In this contribution, after briefly describing the method used, the experiment and the preliminary phases of the data analysis will be presented and discussed.
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4
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Lalanne L, Sorlin O, Poves A, Assié M, Hammache F, Koyama S, Suzuki D, Flavigny F, Girard-Alcindor V, Lemasson A, Matta A, Roger T, Beaumel D, Blumenfeld Y, Brown BA, Santos FDO, Delaunay F, de Séréville N, Franchoo S, Gibelin J, Guillot J, Kamalou O, Kitamura N, Lapoux V, Mauss B, Morfouace P, Niikura M, Pancin J, Saito TY, Stodel C, Thomas JC. Structure of ^{36}Ca under the Coulomb Magnifying Glass. Phys Rev Lett 2022; 129:122501. [PMID: 36179171 DOI: 10.1103/physrevlett.129.122501] [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: 12/07/2021] [Revised: 05/05/2022] [Accepted: 08/08/2022] [Indexed: 06/16/2023]
Abstract
Detailed spectroscopy of the neutron-deficient nucleus ^{36}Ca was obtained up to 9 MeV using the ^{37}Ca(p,d)^{36}Ca and the ^{38}Ca(p,t)^{36}Ca transfer reactions. The radioactive nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid hydrogen target CRYPTA, to produce light ejectiles (the deuteron d or triton t) that were detected in the MUST2 detector array, in coincidence with the heavy residues identified by a zero-degree detection system. Our main findings are (i) a similar shift in energy for the 1_{1}^{+} and 2_{1}^{+} states by about -250 keV, as compared with the mirror nucleus ^{36}S; (ii) the discovery of an intruder 0_{2}^{+} state at 2.83(13) MeV, which appears below the first 2^{+} state, in contradiction with the situation in ^{36}S; and (iii) a tentative 0_{3}^{+} state at 4.83(17) MeV, proposed to exhibit a bubble structure with two neutron vacancies in the 2s_{1/2} orbit. The inversion between the 0_{2}^{+} and 2_{1}^{+} states is due to the large mirror energy difference (MED) of -516(130) keV for the former. This feature is reproduced by shell model calculations, using the sd-pf valence space, predicting an almost pure intruder nature for the 0_{2}^{+} state, with two protons (neutrons) being excited across the Z=20 magic closure in ^{36}Ca (^{36}S). This mirror system has the largest MEDs ever observed, if one excludes the few cases induced by the effect of the continuum.
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Affiliation(s)
- L Lalanne
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
| | - O Sorlin
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
| | - A Poves
- Departamento de Física Teórica and IFT-UAM/CSIC, Universidad Autónoma de Madrid, E-2804 Madrid, Spain
| | - M Assié
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - F Hammache
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - S Koyama
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
- Department of Physics, University of Tokyo, 113-0033, Tokyo, Japan
| | - D Suzuki
- RIKEN Nishina Center, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
| | - F Flavigny
- Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
| | - V Girard-Alcindor
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
| | - A Lemasson
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
| | - A Matta
- Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
| | - T Roger
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
| | - D Beaumel
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - Y Blumenfeld
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - B A Brown
- Department of Physics and Astronomy, National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan, USA
| | - F De Oliveira Santos
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
| | - F Delaunay
- Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
| | - N de Séréville
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - S Franchoo
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - J Gibelin
- Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
| | - J Guillot
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
| | - O Kamalou
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
| | - N Kitamura
- Center for Nuclear Study, University of Tokyo, 113-0033, Tokyo, Japan
| | - V Lapoux
- CEA, Centre de Saclay, IRFU, Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
| | - B Mauss
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
- RIKEN Nishina Center, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
| | - P Morfouace
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
- CEA, DAM, DIF, F-91297 Arpajon, France
| | - M Niikura
- Department of Physics, University of Tokyo, 113-0033, Tokyo, Japan
| | - J Pancin
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
| | - T Y Saito
- Department of Physics, University of Tokyo, 113-0033, Tokyo, Japan
| | - C Stodel
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
| | - J-C Thomas
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, 14076 Caen, France
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5
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Heine M, Fruet G, Courtin S, Jenkins D, Adsley P, Brown A, Canavan R, Catford W, Charon E, Curien D, Della Negra S, Duprat J, Hammache F, Lesrel J, Lotay G, Meyer A, Monpribat E, Montanari D, Morris L, Moukaddam M, Nippert J, Podolyák Z, Regan P, Ribaud I, Richer M, Rudigier M, Shearman R, de Séréville N, Stodel C. Direct Measurement of Carbon Fusion at Astrophysical Energies with Gamma-Particle Coincidences. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202226001004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present 12C+12C direct fusion measurements with STELLA UKFATIMA, that reach into the region of astrophysics interest relevant to massive stars (M⊙ ≈ 25) using self-supporting thin rotating carbon foils [1]. We demonstrate that detecting gammas and light charged particles in coincidence with nanosecond timing is key for effective background reduction achieving reliable measurements in the sub-nanobarn range. We give details about core developments of the detection apparatus as well as the coincidence-analysis procedure of low count statistics. The present data largely follows the phenomenological hindrance interpolation and shows indication for resonant behaviour at the lowest energy explored.
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6
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Fruet G, Courtin S, Heine M, Jenkins DG, Adsley P, Brown A, Canavan R, Catford WN, Charon E, Curien D, Della Negra S, Duprat J, Hammache F, Lesrel J, Lotay G, Meyer A, Montanari D, Morris L, Moukaddam M, Nippert J, Podolyák Z, Regan PH, Ribaud I, Richer M, Rudigier M, Shearman R, de Séréville N, Stodel C. Advances in the Direct Study of Carbon Burning in Massive Stars. Phys Rev Lett 2020; 124:192701. [PMID: 32469543 DOI: 10.1103/physrevlett.124.192701] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/27/2019] [Accepted: 02/21/2020] [Indexed: 06/11/2023]
Abstract
The ^{12}C+^{12}C fusion reaction plays a critical role in the evolution of massive stars and also strongly impacts various explosive astrophysical scenarios. The presence of resonances in this reaction at energies around and below the Coulomb barrier makes it impossible to carry out a simple extrapolation down to the Gamow window-the energy regime relevant to carbon burning in massive stars. The ^{12}C+^{12}C system forms a unique laboratory for challenging the contemporary picture of deep sub-barrier fusion (possible sub-barrier hindrance) and its interplay with nuclear structure (sub-barrier resonances). Here, we show that direct measurements of the ^{12}C+^{12}C fusion cross section may be made into the Gamow window using an advanced particle-gamma coincidence technique. The sensitivity of this technique effectively removes ambiguities in existing measurements made with gamma ray or charged-particle detection alone. The present cross-section data span over 8 orders of magnitude and support the fusion-hindrance model at deep sub-barrier energies.
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Affiliation(s)
- G Fruet
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
| | - S Courtin
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
- USIAS/Université de Strasbourg, Strasbourg F-67083, France
| | - M Heine
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
| | - D G Jenkins
- University of York, York YO10 5DD, United Kingdom
| | - P Adsley
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - A Brown
- University of York, York YO10 5DD, United Kingdom
| | - R Canavan
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
- National Physical Laboratory, Teddington, Middlesex TW110 LW, United Kingdom
| | - W N Catford
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - E Charon
- NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay F-91191 Gif sur Yvette, France
| | - D Curien
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
| | - S Della Negra
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - J Duprat
- Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris Sud, UMR 8609-CNRS/IN2P3, 91405 Orsay, France
| | - F Hammache
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - J Lesrel
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - G Lotay
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - A Meyer
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - D Montanari
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
- USIAS/Université de Strasbourg, Strasbourg F-67083, France
| | - L Morris
- University of York, York YO10 5DD, United Kingdom
| | - M Moukaddam
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - J Nippert
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
| | - Zs Podolyák
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - P H Regan
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
- National Physical Laboratory, Teddington, Middlesex TW110 LW, United Kingdom
| | - I Ribaud
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - M Richer
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
| | - M Rudigier
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - R Shearman
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
- National Physical Laboratory, Teddington, Middlesex TW110 LW, United Kingdom
| | - N de Séréville
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - C Stodel
- GANIL, CEA/DSM-CNRS/IN2P3, Caen F-14076, France
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7
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Oliva AA, Lamia L, Guardo GL, Spitaleri C, Cherubini S, Cvetinovic A, D’Agata G, de Sereville N, Pietro AD, Figuera P, Gulino M, Hammache F, Hayakawa S, Indelicato I, Cognata ML, Commara ML, Lattuada D, Lattuada M, Manico G, Mazzocco M, Messina S, Palmerini S, Pizzone R, Pumo M, Rapisarda G, Romano S, Sergi M, Soic N, Spartà R, Tumino A. Study of the neutron induced reaction 17O(n,α)14C at astrophysical energies via the Trojan Horse Method. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202022702007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Neutron induced reactions are fundamental for the nucleosynthesis of elements in the universe. Indeed, to correctly study the reactions involved in the well-known s-process in stars, which produce about half of the elements beyond the iron peak, it is mandatory to know the neutron abundance available in those stars. The 17O(n, a)14C reaction is one of the so-called “neutron poisons” for the pro- cess and it could play an important role in the balance of the neutron abundance. The reaction is therefore investigated in the energy range of astrophysical inter- est between 0 and 350 keV in the center of mass by applying the Trojan Horse Method to the three body reaction 2H(17O, a14C)H.
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8
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Meyer A, de Séréville N, Hammache F, Adsley P, Assié M, Beaumel D, Delafosse C, Flavigny F, Georgiadou A, Gottardo A, Grassi L, Guillot J, Id Barkach T, MacCormick M, Matea I, Olivier L, Perrot L, Portail C, Stefan I, Parikh A, Coc A, Kiener J, Tatischeff V, Laird AM, Fox SP, Hubbard N, Riley J, De Oliveira F, Bastin B, Béroff K, Sánchez Benítez ÁM, Alellara A, Assunção M, Guimaraes V, Oulebsir N, D’Agata G. Study of key resonances in the 30P( p,γ) 31S reaction in classical novae. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201818402010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Among reactions with strong impact on classical novae model predictions, 30P(p,γ)31S is one of the few remained that are worthy to be measured accurately, because of their rate uncertainty, as like as 18F(p,α)15O and 25Al(pγ)26Si. To reduce the nuclear uncertainties associated to this reaction, we performed an experiment at ALTO facility of Orsay using the 31P(3He,t)31S reaction to populate 31S excited states of astrophysical interest and detect in coincidence the protons coming from the decay of the populated states in order to extract the proton branching ratios. After a presentation of the astrophysical context of this work, the current situation of the 30P(p,γ)31S reaction rate will be discussed. Then the experiment set-up of this work and the analysis of the single events will be presented.
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9
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Courtin S, Jiang C, Fruet G, Heine M, Jenkins D, Adsley P, Morris L, Regan P, Rudigier M, Montanari D, Della Negra S, de Séréville N, Haas F, Hammache F, Kirsebom O, Lesrel J, Meyer A, Montanari D, Auranen K, Avila M, Ayangeakaa A, Back B, Bottoni S, Carpenter M, Dickerson C, DiGiovine B, Greene J, Henderson D, Hoffman C, Janssens R, Kay B, Kuvin S, Lauritsen T, Pardo R, Rehm K, Santiago-Gonzalez D, Sethi J, Seweryniak D, Talwar R, Ugalde C, Zhu S, Deibel C, Marley S, Bourgin D, Stodel C, Lefebvre-Schuhl A, Almaraz-Calderon S, Fang X, Tang X, Alcorta M, Bucher B, Albers M, Bertone P. Cross section measurements in the 12C+12C system. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201716501015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Heine M, Courtin S, Fruet G, Jenkins D, Montanari D, Adsley P, Beck C, Della Negra S, Dené P, Haas F, Hammache F, Heitz G, Kirsebom O, Krauth M, Lesrel J, Meyer A, Morris L, Regan P, Richer M, Rudigier M, de Séréville N, Stodel C. Sub-barrier fusion cross section measurements with STELLA. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201716501029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Kisamori K, Shimoura S, Miya H, Michimasa S, Ota S, Assie M, Baba H, Baba T, Beaumel D, Dozono M, Fujii T, Fukuda N, Go S, Hammache F, Ideguchi E, Inabe N, Itoh M, Kameda D, Kawase S, Kawabata T, Kobayashi M, Kondo Y, Kubo T, Kubota Y, Kurata-Nishimura M, Lee CS, Maeda Y, Matsubara H, Miki K, Nishi T, Noji S, Sakaguchi S, Sakai H, Sasamoto Y, Sasano M, Sato H, Shimizu Y, Stolz A, Suzuki H, Takaki M, Takeda H, Takeuchi S, Tamii A, Tang L, Tokieda H, Tsumura M, Uesaka T, Yako K, Yanagisawa Y, Yokoyama R, Yoshida K. Candidate Resonant Tetraneutron State Populated by the ^{4}He(^{8}He,^{8}Be) Reaction. Phys Rev Lett 2016; 116:052501. [PMID: 26894705 DOI: 10.1103/physrevlett.116.052501] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Indexed: 06/05/2023]
Abstract
A candidate resonant tetraneutron state is found in the missing-mass spectrum obtained in the double-charge-exchange reaction ^{4}He(^{8}He,^{8}Be) at 186 MeV/u. The energy of the state is 0.83±0.65(stat)±1.25(syst) MeV above the threshold of four-neutron decay with a significance level of 4.9σ. Utilizing the large positive Q value of the (^{8}He,^{8}Be) reaction, an almost recoilless condition of the four-neutron system was achieved so as to obtain a weakly interacting four-neutron system efficiently.
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Affiliation(s)
- K Kisamori
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Shimoura
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - H Miya
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Michimasa
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - S Ota
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - M Assie
- IPN Orsay, 15 Rue, Georges, Clemenceau 91400 Orsay, France
| | - H Baba
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - T Baba
- Department of Physics, Kyoto University, Yoshida-Honcho, Sakyo, Kyoto 606-8501, Japan
| | - D Beaumel
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- IPN Orsay, 15 Rue, Georges, Clemenceau 91400 Orsay, France
| | - M Dozono
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - T Fujii
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - N Fukuda
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Go
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - F Hammache
- IPN Orsay, 15 Rue, Georges, Clemenceau 91400 Orsay, France
| | - E Ideguchi
- Research Center for Nuclear Physics, Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - N Inabe
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - M Itoh
- Cyclotron and Radioisotope Center, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - D Kameda
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Kawase
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - T Kawabata
- Department of Physics, Kyoto University, Yoshida-Honcho, Sakyo, Kyoto 606-8501, Japan
| | - M Kobayashi
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Y Kondo
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8550, Japan
| | - T Kubo
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Y Kubota
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | | | - C S Lee
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Y Maeda
- Faculty of Engineering, University of Miyazaki, 1-1 Gakuen, Kibanadai-nishi, Miyazaki 889-2192, Japan
| | - H Matsubara
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba, Japan
| | - K Miki
- Research Center for Nuclear Physics, Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - T Nishi
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - S Noji
- National Superconducting Cyclotron Laboratory, Michigan State University, 640 S Shaw Lane, East Lansing, Michigan 48824, USA
| | - S Sakaguchi
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Kyushu University, 6-10-1 Hakozaki, Higashi, Fukuoka 812-8581, Japan
| | - H Sakai
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Y Sasamoto
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - M Sasano
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Sato
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Y Shimizu
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - A Stolz
- National Superconducting Cyclotron Laboratory, Michigan State University, 640 S Shaw Lane, East Lansing, Michigan 48824, USA
| | - H Suzuki
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - M Takaki
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - H Takeda
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Takeuchi
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - A Tamii
- Research Center for Nuclear Physics, Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - L Tang
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - H Tokieda
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - M Tsumura
- Department of Physics, Kyoto University, Yoshida-Honcho, Sakyo, Kyoto 606-8501, Japan
| | - T Uesaka
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - K Yako
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Y Yanagisawa
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - R Yokoyama
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - K Yoshida
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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12
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Hammache F, Oulebsir N, Benamara S, De Séréville N, Coc A, Laird A, Stefan I, Roussel P. Indirect techniques for astrophysical reaction rates determinations. EPJ Web of Conferences 2016. [DOI: 10.1051/epjconf/201611709003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Yamaguchi H, Kahl D, Hayakawa S, Sakaguchi Y, Wakabayashi Y, Hashimoto T, Cherubini S, Gulino M, Spitaleri C, Rapisarda G, La Cognata M, Lamia L, Romano S, Kubono S, Iwasa N, Teranishi T, Kawabata T, Kwon Y, Binh D, Khiem L, Duy N, Kato S, Komatsubara T, Coc A, De Sereville N, Hammache F, Kiss G, Bishop S. Studying astrophysical reactions with low-energy RI beams at CRIB. EPJ Web of Conferences 2016. [DOI: 10.1051/epjconf/201611709005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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14
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Burgunder G, Sorlin O, Nowacki F, Giron S, Hammache F, Moukaddam M, de Séréville N, Beaumel D, Càceres L, Clément E, Duchêne G, Ebran JP, Fernandez-Dominguez B, Flavigny F, Franchoo S, Gibelin J, Gillibert A, Grévy S, Guillot J, Lepailleur A, Matea I, Matta A, Nalpas L, Obertelli A, Otsuka T, Pancin J, Poves A, Raabe R, Scarpaci JA, Stefan I, Stodel C, Suzuki T, Thomas JC. Experimental study of the two-body spin-orbit force in nuclei. Phys Rev Lett 2014; 112:042502. [PMID: 24580444 DOI: 10.1103/physrevlett.112.042502] [Citation(s) in RCA: 2] [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: 07/23/2013] [Indexed: 06/03/2023]
Abstract
Energies and spectroscopic factors of the first 7/2-, 3/2-, 1/2-, and 5/2- states in the (35)Si21 nucleus were determined by means of the (d, p) transfer reaction in inverse kinematics at GANIL using the MUST2 and EXOGAM detectors. By comparing the spectroscopic information on the Si35 and S37 isotones, a reduction of the p3/2-p1/2 spin-orbit splitting by about 25% is proposed, while the f7/2-f5/2 spin-orbit splitting seems to remain constant. These features, derived after having unfolded nuclear correlations using shell model calculations, have been attributed to the properties of the two-body spin-orbit interaction, the amplitude of which is derived for the first time in an atomic nucleus. The present results, remarkably well reproduced by using several realistic nucleon-nucleon forces, provide a unique touchstone for the modeling of the spin-orbit interaction in atomic nuclei.
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Affiliation(s)
- G Burgunder
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, France
| | - O Sorlin
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, France
| | - F Nowacki
- IPHC, CNRS/IN2P3, Université de Strasbourg, F-67037 Strasbourg, France
| | - S Giron
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France
| | - F Hammache
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France
| | - M Moukaddam
- IPHC, CNRS/IN2P3, Université de Strasbourg, F-67037 Strasbourg, France
| | - N de Séréville
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France
| | - D Beaumel
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France
| | - L Càceres
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, France
| | - E Clément
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, France
| | - G Duchêne
- IPHC, CNRS/IN2P3, Université de Strasbourg, F-67037 Strasbourg, France
| | - J P Ebran
- CEA, DAM, DIF, Bruyères-le-Châtel, F-91297 Arpajon Cedex, France
| | - B Fernandez-Dominguez
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, France and Department of Particle Physics, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
| | - F Flavigny
- CEA Saclay, IRFU, Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | - S Franchoo
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France
| | - J Gibelin
- LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, F14050 CAEN Cedex, France
| | - A Gillibert
- CEA Saclay, IRFU, Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | - S Grévy
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, France and Centre d Études Nucléaires de Bordeaux Gradignan-Université Bordeaux 1-UMR 5797 CNRS/IN2P3, Chemin du Solarium, BP 120, 33175 Gradignan, France
| | - J Guillot
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France
| | - A Lepailleur
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, France
| | - I Matea
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France
| | - A Matta
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France and Department of Physics, University of Surrey, Guildford GU2 5XH, United Kingdom
| | - L Nalpas
- CEA Saclay, IRFU, Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | - A Obertelli
- CEA Saclay, IRFU, Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | - T Otsuka
- Department of Physics and Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - J Pancin
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, France
| | - A Poves
- Departamento de Fisica Teorica e IFT-UAM/CSIC, Universidad Autonoma de Madrid, E-28049 Madrid, Spain
| | - R Raabe
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, France and Instituut voor Kern-en Stralingsfysica, KU Leuven, Leuven, Belgium
| | - J A Scarpaci
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
| | - I Stefan
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, F-91406 Orsay, France
| | - C Stodel
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, France
| | - T Suzuki
- Department of Physics, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan
| | - J C Thomas
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, France
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15
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Flavigny F, Gillibert A, Nalpas L, Obertelli A, Keeley N, Barbieri C, Beaumel D, Boissinot S, Burgunder G, Cipollone A, Corsi A, Gibelin J, Giron S, Guillot J, Hammache F, Lapoux V, Matta A, Pollacco EC, Raabe R, Rejmund M, de Séreville N, Shrivastava A, Signoracci A, Utsuno Y. Limited asymmetry dependence of correlations from single nucleon transfer. Phys Rev Lett 2013; 110:122503. [PMID: 25166799 DOI: 10.1103/physrevlett.110.122503] [Citation(s) in RCA: 5] [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: 08/01/2012] [Revised: 01/09/2013] [Indexed: 06/03/2023]
Abstract
Single nucleon pickup reactions were performed with a 18.1 MeV/nucleon (14)O beam on a deuterium target. Within the coupled reaction channel framework, the measured cross sections were compared to theoretical predictions and analyzed using both phenomenological and microscopic overlap functions. The missing strength due to correlations does not show significant dependence on the nucleon separation energy asymmetry over a wide range of 37 MeV, in contrast with nucleon removal data analyzed within the sudden-eikonal formalism.
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Affiliation(s)
- F Flavigny
- CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France and Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium
| | - A Gillibert
- CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | - L Nalpas
- CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | - A Obertelli
- CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | - N Keeley
- National Centre for Nuclear Research, ul Andrezja Sołtana 7, PL-05400 Otwock, Poland
| | - C Barbieri
- Department of Physics, University of Surrey, Guilford GU2 7XH, United Kingdom
| | - D Beaumel
- Institut de Physique Nucléaire Orsay, IN2P3-CNRS, 91406 Orsay Cedex, France
| | - S Boissinot
- CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | | | - A Cipollone
- Department of Physics, University of Surrey, Guilford GU2 7XH, United Kingdom and Dipartimento di Fisica, Università Sapienza, I-00185 Roma, Italy and INFN, Sezione di Roma, Piazzale Aldo Moro 2, I-00185 Roma, Italy
| | - A Corsi
- CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | - J Gibelin
- LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, Caen, France
| | - S Giron
- Institut de Physique Nucléaire Orsay, IN2P3-CNRS, 91406 Orsay Cedex, France
| | - J Guillot
- Institut de Physique Nucléaire Orsay, IN2P3-CNRS, 91406 Orsay Cedex, France
| | - F Hammache
- Institut de Physique Nucléaire Orsay, IN2P3-CNRS, 91406 Orsay Cedex, France
| | - V Lapoux
- CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | - A Matta
- Institut de Physique Nucléaire Orsay, IN2P3-CNRS, 91406 Orsay Cedex, France
| | - E C Pollacco
- CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | - R Raabe
- Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium and GANIL, BP 55076,14076 Caen Cedex 5, France
| | - M Rejmund
- GANIL, BP 55076,14076 Caen Cedex 5, France
| | - N de Séreville
- Institut de Physique Nucléaire Orsay, IN2P3-CNRS, 91406 Orsay Cedex, France
| | | | - A Signoracci
- CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
| | - Y Utsuno
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
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16
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Suzuki D, Iwasaki H, Beaumel D, Nalpas L, Pollacco E, Assié M, Baba H, Blumenfeld Y, De Séréville N, Drouart A, Franchoo S, Gillibert A, Guillot J, Hammache F, Keeley N, Lapoux V, Maréchal F, Michimasa S, Mougeot X, Mukha I, Okamura H, Otsu H, Ramus A, Roussel-Chomaz P, Sakurai H, Scarpaci JA, Sorlin O, Stefan I, Takechi M. Breakdown of the Z=8 shell closure in unbound 12O and its mirror symmetry. Phys Rev Lett 2009; 103:152503. [PMID: 19905630 DOI: 10.1103/physrevlett.103.152503] [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: 06/02/2009] [Indexed: 05/28/2023]
Abstract
An excited state in the proton-rich unbound nucleus 12O was identified at 1.8(4) MeV via missing-mass spectroscopy with the 14O(p,t) reaction at 51 AMeV. The spin-parity of the state was determined to be 0+ or 2+ by comparing the measured differential cross sections with distorted-wave calculations. The lowered location of the excited state in 12O indicates the breakdown of the major shell closure at Z=8 near the proton drip line. This demonstrates the persistence of mirror symmetry in the disappearance of the magic number 8 between 12O and its mirror partner 12Be.
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Affiliation(s)
- D Suzuki
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
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17
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Fortier S, Tryggestad E, Rich E, Beaumel D, Becheva E, Blumenfeld Y, Delaunay F, Drouart A, Fomichev A, Frascaria N, Gales S, Gaudefroy L, Gillibert A, Guillot J, Hammache F, Kemper KW, Khan E, Lapoux V, Lima V, Nalpas L, Obertelli A, Pollacco EC, Skaza F, Pramanik UD, Roussel-Chomaz P, Santonocito D, Scarpaci JA, Sorlin O, Stepantsov SV, Ter Akopian GM, Wolski R. Search for resonances in 4n, 7H and 9He via transfer reactions. ACTA ACUST UNITED AC 2007. [DOI: 10.1063/1.2746575] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Gaudefroy L, Sorlin O, Beaumel D, Blumenfeld Y, Dombrádi Z, Fortier S, Franchoo S, Gélin M, Gibelin J, Grévy S, Hammache F, Ibrahim F, Kemper KW, Kratz KL, Lukyanov SM, Monrozeau C, Nalpas L, Nowacki F, Ostrowski AN, Otsuka T, Penionzhkevich YE, Piekarewicz J, Pollacco EC, Roussel-Chomaz P, Rich E, Scarpaci JA, St Laurent MG, Sohler D, Stanoiu M, Suzuki T, Tryggestad E, Verney D. Reduction of the spin-orbit splittings at the n = 28 shell closure. Phys Rev Lett 2006; 97:092501. [PMID: 17026356 DOI: 10.1103/physrevlett.97.092501] [Citation(s) in RCA: 3] [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: 04/06/2006] [Indexed: 05/12/2023]
Abstract
The N = 28 shell closure has been investigated via the 46Ar(d,p)47Ar transfer reaction in inverse kinematics. Energies and spectroscopic factors of the neutron p(3/2), p(1/2), and f(5/2) states in 47Ar were determined and compared to those of the 49Ca isotone. We deduced a reduction of the N = 28 gap by 330(90) keV and spin-orbit weakenings of approximately 10(2) and 45(10)% for the f and p states, respectively. Such large variations for the f and p spin-orbit splittings could be accounted for by the proton-neutron tensor force and by the density dependence of the spin-orbit interaction, respectively. This contrasts with the picture of the spin-orbit interaction as a surface term only.
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Affiliation(s)
- L Gaudefroy
- IPN, IN2P3-CNRS,F- 91406 Orsay Cedex, France
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19
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Perru O, Sorlin O, Franchoo S, Azaiez F, Bouchez E, Bourgeois C, Chatillon A, Daugas JM, Dlouhy Z, Dombrádi Z, Donzaud C, Gaudefroy L, Grawe H, Grévy S, Guillemaud-Mueller D, Hammache F, Ibrahim F, Le Coz Y, Lukyanov SM, Matea I, Mrazek J, Nowacki F, Penionzhkevich YE, de Oliveira Santos F, Pougheon F, Saint-Laurent MG, Sletten G, Stanoiu M, Stodel C, Theisen C, Verney D. Enhanced core polarization in (70)Ni and (74)Zn. Phys Rev Lett 2006; 96:232501. [PMID: 16803374 DOI: 10.1103/physrevlett.96.232501] [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: 05/17/2005] [Revised: 04/26/2006] [Indexed: 05/10/2023]
Abstract
The reduced transition probabilities B(E2;0(+) --> 2(+)(1)) of the neutron-rich (74)Zn and (70)Ni nuclei have been measured by Coulomb excitation in a (208)Pb target at intermediate energy. These nuclei have been produced at Grand Accélérateur National d'Ions Lourds via interactions of a 60A MeV (76)Ge beam with a Be target. The B(E2) value for (70)Ni(42) is unexpectedly large, which indicates that neutrons added above N=40 strongly polarize the Z=28 proton core. In the Zn isotopic chain, the steep rise of B(E2) values beyond N=40 continues up to (74)Zn(44). The enhanced proton core polarization in (70)Ni is attributed to the monopole interaction between the neutron in the g(9/2) and protons in the f(7/2) and f(5/2) spin-orbit partner orbitals. This interaction could result in a weakening of magicity in (78)Ni(50).
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Affiliation(s)
- O Perru
- Institut de Physique Nucléaire, IN2P3-CNRS, F-91406 Orsay Cedex, France
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20
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Cortina-Gil D, Fernandez-Vazquez J, Aumann T, Baumann T, Benlliure J, Borge MJG, Chulkov LV, Datta Pramanik U, Forssén C, Fraile LM, Geissel H, Gerl J, Hammache F, Itahashi K, Janik R, Jonson B, Mandal S, Markenroth K, Meister M, Mocko M, Münzenberg G, Ohtsubo T, Ozawa A, Prezado Y, Pribora V, Riisager K, Scheit H, Schneider R, Schrieder G, Simon H, Sitar B, Stolz A, Strmen P, Sümmerer K, Szarka I, Weick H. Shell structure of the near-dripline nucleus 23O. Phys Rev Lett 2004; 93:062501. [PMID: 15323623 DOI: 10.1103/physrevlett.93.062501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2003] [Indexed: 05/24/2023]
Abstract
Breakup reactions were used to study the ground-state configuration of the neutron-rich isotope 23O. The 22O fragments produced in one-nucleon removal from 23O at 938 MeV/nucleon in a carbon target were detected in coincidence with deexciting gamma rays. The widths of the longitudinal momentum distributions of the 22O fragments and the one-neutron removal cross sections were interpreted in the framework of a simple theoretical model which favors the assignment of Ipi = 1/2+ to the 23O ground state.
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Affiliation(s)
- D Cortina-Gil
- Universidad de Santiago de Compostela, E-15706, Spain
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21
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Schümann F, Hammache F, Typel S, Uhlig F, Sümmerer K, Böttcher I, Cortina D, Förster A, Gai M, Geissel H, Greife U, Iwasa N, Koczoń P, Kohlmeyer B, Kulessa R, Kumagai H, Kurz N, Menzel M, Motobayashi T, Oeschler H, Ozawa A, Płoskoń M, Prokopowicz W, Schwab E, Senger P, Strieder F, Sturm C, Sun ZY, Surówka G, Wagner A, Waluś W. Coulomb dissociation of 8B and the low-energy cross section of the 7Be(p,gamma)8B solar fusion reaction. Phys Rev Lett 2003; 90:232501. [PMID: 12857251 DOI: 10.1103/physrevlett.90.232501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2003] [Indexed: 05/24/2023]
Abstract
An exclusive measurement of the Coulomb breakup of 8B into 7Be+p at 254A MeV allowed the study of the angular correlations of the breakup particles. These correlations demonstrate clearly that E1 multipolarity dominates and that E2 multipolarity can be neglected. By using a simple single-particle model for 8B and treating the breakup in first-order perturbation theory, we extract a zero-energy S factor of S17(0)=18.6+/-1.2+/-1.0 eV b, where the first error is experimental and the second one reflects the theoretical uncertainty in the extrapolation.
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Affiliation(s)
- F Schümann
- Institut für Physik mit Ionenstrahlen, Ruhr-Universität Bochum, D-44780 Bochum, Germany
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22
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Hammache F, Bogaert G, Aguer P, Angulo C, Barhoumi S, Brillard L, Chemin JF, Claverie G, Coc A, Hussonnois M, Jacotin M, Kiener J, Lefebvre A, Le Naour C, Ouichaoui S, Scheurer JN, Tatischeff V, Thibaud JP, Virassamynaïken E. Low-energy measurement of the 7Be(p,gamma)8B cross section. Phys Rev Lett 2001; 86:3985-3988. [PMID: 11328076 DOI: 10.1103/physrevlett.86.3985] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2000] [Indexed: 05/23/2023]
Abstract
We have measured the cross section of the 7Be(p,gamma)8B reaction for E(c.m.) = 185.8, 134.7, and 111.7 keV using a radioactive 7Be target (132 mCi). Single and coincidence spectra of beta+ and alpha particles from 8B and 8Be* decay, respectively, were measured using a large acceptance spectrometer. The zero energy S factor inferred from these data is 18.5+/-2.4 eV b and a weighted mean value of 18.8+/-1.7 eV b (theoretical uncertainty included) is deduced when combining this value with our previous results at higher energies.
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Affiliation(s)
- F Hammache
- CSNSM, IN2P3-CNRS, F-91405 Orsay et Université de Paris-Sud, France
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