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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.
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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
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Niu Z, Liang H, Sun B, Niu Y, Guo J, Meng J. High precision nuclear mass predictions towards a hundred kilo-electron-volt accuracy. Sci Bull (Beijing) 2018; 63:759-764. [PMID: 36658949 DOI: 10.1016/j.scib.2018.05.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 04/23/2018] [Accepted: 05/02/2018] [Indexed: 01/21/2023]
Abstract
Mass is a fundamental property and an important fingerprint of atomic nucleus. It provides an extremely useful test ground for nuclear models and is crucial to understand energy generation in stars as well as the heavy elements synthesized in stellar explosions. Nuclear physicists have been attempting at developing a precise, reliable, and predictive nuclear model that is suitable for the whole nuclear chart, while this still remains a great challenge even in recent days. Here we employ the Fourier spectral analysis to examine the deviations of nuclear mass predictions to the experimental data and to present a novel way for accurate nuclear mass predictions. In this analysis, we map the mass deviations from the space of nucleon number to its conjugate space of frequency, and are able to pin down the main contributions to the model deficiencies. By using the radial basis function approach we can further isolate and quantify the sources. Taking a pedagogical mass model as an example, we examine explicitly the correlation between nuclear effective interactions and the distributions of mass deviations in the frequency domain. The method presented in this work, therefore, opens up a new way for improving the nuclear mass predictions towards a hundred kilo-electron-volt accuracy, which is argued to be the chaos-related limit for the nuclear mass predictions.
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Affiliation(s)
- Zhongming Niu
- School of Physics and Materials Science, Anhui University, Hefei 230601, China
| | | | - Baohua Sun
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Yifei Niu
- ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, RO-077125 Bucharest-Magurele, Romania
| | - Jianyou Guo
- School of Physics and Materials Science, Anhui University, Hefei 230601, China
| | - Jie Meng
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China; State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China; Department of Physics, University of Stellenbosch, Stellenbosch 7602, South Africa.
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Abstract
In this contribution we review the present status of experimental studies of electroweak decays of highly charged ions. A particular focus will be given on the bound state beta decay measurement of 205Tl.
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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.
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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
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Gao BS, Najafi MA, Atanasov DR, Blaum K, Bosch F, Brandau C, Chen XC, Dillmann I, Dimopoulou C, Faestermann T, Geissel H, Gernhäuser R, Hillenbrand PM, Kovalenko O, Kozhuharov C, Litvinov SA, Litvinov YA, Maier L, Nolden F, Piotrowski J, Sanjari MS, Scheidenberger C, Spillmann U, Steck M, Stöhlker T, Trageser C, Tu XL, Weick H, Winckler N, Xu HS, Yamaguchi T, Yan XL, Zhang YH, Zhou XH. Radioactive decays of highly-charged ions. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20159305003] [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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Gallant AT, Brodeur M, Andreoiu C, Bader A, Chaudhuri A, Chowdhury U, Grossheim A, Klawitter R, Kwiatkowski AA, Leach KG, Lennarz A, Macdonald TD, Schultz BE, Lassen J, Heggen H, Raeder S, Teigelhöfer A, Brown BA, Magilligan A, Holt JD, Menéndez J, Simonis J, Schwenk A, Dilling J. Breakdown of the isobaric multiplet mass equation for the A = 20 and 21 multiplets. Phys Rev Lett 2014; 113:082501. [PMID: 25192091 DOI: 10.1103/physrevlett.113.082501] [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: 11/27/2013] [Indexed: 06/03/2023]
Abstract
Using the Penning trap mass spectrometer TITAN, we performed the first direct mass measurements of (20,21)Mg, isotopes that are the most proton-rich members of the A = 20 and A = 21 isospin multiplets. These measurements were possible through the use of a unique ion-guide laser ion source, a development that suppressed isobaric contamination by 6 orders of magnitude. Compared to the latest atomic mass evaluation, we find that the mass of (21)Mg is in good agreement but that the mass of (20)Mg deviates by 3 σ. These measurements reduce the uncertainties in the masses of (20,21)Mg by 15 and 22 times, respectively, resulting in a significant departure from the expected behavior of the isobaric multiplet mass equation in both the A = 20 and A = 21 multiplets. This presents a challenge to shell model calculations using either the isospin nonconserving universal sd USDA and USDB Hamiltonians or isospin nonconserving interactions based on chiral two- and three-nucleon forces.
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Affiliation(s)
- A T Gallant
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada and Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1 Canada
| | - M Brodeur
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - C Andreoiu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6 Canada
| | - A Bader
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada and École des Mines de Nantes, La Chantrerie, 4, rue Alfred Kastler, B.P. 20722, F-44307 Nantes Cedex 3, France
| | - A Chaudhuri
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada
| | - U Chowdhury
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada and Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, R3T 2N2 Canada
| | - A Grossheim
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada
| | - R Klawitter
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada and Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - A A Kwiatkowski
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada
| | - K G Leach
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6 Canada
| | - A Lennarz
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada and Institut für Kernphysik, Westfälische Wilhelms-Universität, D-48149 Münster, Germany
| | - T D Macdonald
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada and Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1 Canada
| | - B E Schultz
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada
| | - J Lassen
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada and Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, R3T 2N2 Canada
| | - H Heggen
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada
| | - S Raeder
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada
| | - A Teigelhöfer
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada and Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, R3T 2N2 Canada
| | - B A Brown
- Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321, USA
| | - A Magilligan
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - J D Holt
- Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321, USA and Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - J Menéndez
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - J Simonis
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - A Schwenk
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - J Dilling
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada and Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1 Canada
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