兰州大学机构库
Large Isospin Asymmetry in Si 22 / O 22 Mirror Gamow-Teller Transitions Reveals the Halo Structure of Al 22
2020-11-05
Source PublicationPhysical Review Letters
Volume125
Issue19
PublisherAmerican Physical Society
Abstractβ-delayed one-proton emissions of Si22, the lightest nucleus with an isospin projection Tz=-3, are studied with a silicon array surrounded by high-purity germanium detectors. Properties of β-decay branches and the reduced transition probabilities for the transitions to the low-lying states of Al22 are determined. Compared to the mirror β decay of O22, the largest value of mirror asymmetry in low-lying states by far, with δ=209(96), is found in the transition to the first 1+ excited state. Shell-model calculation with isospin-nonconserving forces, including the T=1, J=2, 3 interaction related to the s1/2 orbit that introduces explicitly the isospin-symmetry breaking force and describes the loosely bound nature of the wave functions of the s1/2 orbit, can reproduce the observed data well and consistently explain the observation that a large δ value occurs for the first but not for the second 1+ excited state of Al22. Our results, while supporting the proton-halo structure in Al22, might provide another means to identify halo nuclei. © 2020 American Physical Society.
KeywordMirrors Silicon detectors Wave functionsGamow-Teller transitions High purity germanium detectors Isospin asymmetries Low-lying state Mirror asymmetry Proton emission Symmetry-breaking Transition probabilities
DOI10.1103/PhysRevLett.125.192503
Indexed ByEI
Language英语
ISSN00319007
EI Accession Number20204709506447
EI KeywordsExcited states
EI Classification Number741.3 Optical Devices and Systems - 921 Mathematics - 931.3 Atomic and Molecular Physics - 944.7 Radiation Measuring Instruments
Citation statistics
Document Type会议论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/441139
Collection兰州大学
Affiliation1.Department of Physics, University of Hong Kong, Hong Kong, Hong Kong;
2.Cas Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou; 730000, China;
3.Department of Nuclear Physics, China Institute of Atomic Energy, Beijing; 102413, China;
4.University of Chinese Academy of Sciences, Beijing; 100049, China;
5.Advanced Energy Science and Technology Guangdong Laboratory, Huizhou; 516003, China;
6.Department of Physics, Kyushu Sangyo University, Fukuoka; 813-8503, Japan;
7.School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai; 200240, China;
8.College of Physics and Technology, Guangxi Normal University, Guilin; 541004, China;
9.National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing; MI; 48824, United States;
10.School of Physic, State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing; 100871, China;
11.Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai; 200433, China;
12.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai; 201800, China;
13.School of Science, Huzhou University, Huzhou; 313000, China;
14.Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai; 519082, China;
15.Institute of Particle and Nuclear Physics, Henan Normal University, Xinxiang; 453007, China;
16.School of Physics and Nuclear Energy Engineering, Beihang University, Beijing; 100191, China;
17.School of Nuclear Science and Technology, Lanzhou University, Lanzhou; 730000, China
First Author AffilicationSchool of Physical Sicence and Technology
Recommended Citation
GB/T 7714
Lee, J.,Xu, X.X.,Kaneko, K.,et al. Large Isospin Asymmetry in Si 22 / O 22 Mirror Gamow-Teller Transitions Reveals the Halo Structure of Al 22[C]:American Physical Society,2020.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Altmetrics Score
Google Scholar
Similar articles in Google Scholar
[Lee, J.]'s Articles
[Xu, X.X.]'s Articles
[Kaneko, K.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Lee, J.]'s Articles
[Xu, X.X.]'s Articles
[Kaneko, K.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Lee, J.]'s Articles
[Xu, X.X.]'s Articles
[Kaneko, K.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
No comment.
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.