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Large Isospin Asymmetry in
Lee, J; Xu, X X; Kaneko, K; Sun, Y; Lin, C J; Sun, L J; Liang, P F; Li, Z H; Li, J; Wu, H Y; Fang, D Q; Wang, J S; Yang, Y Y; Yuan, C X; Lam, Y H; Wang, Y T; Wang, K; Wang, J G; Ma, J B; Liu, J J; Li, P J; Zhao, Q Q; Yang, L; Ma, N R; Wang, D X; Zhong, F P; Zhong, S H; Yang, F; Jia, H M; Wen, P W; Pan, M; Zang, H L; Wang, X; Wu, C G; Luo, D W; Wang, H W; Li, C; Shi, C Z; Nie, M W; Li, X F; Li, H; Ma, P; Hu, Q; Shi, G Z; Jin, S L; Huang, M R; Bai, Z; Zhou, Y J; Ma, W H; Duan, F F.
Affiliation
  • Lee J; Department of Physics, The University of Hong Kong, Hong Kong, China.
  • Xu XX; Department of Physics, The University of Hong Kong, Hong Kong, China.
  • Kaneko K; CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
  • Sun Y; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Lin CJ; University of Chinese Academy of Sciences, Beijing 100049, China.
  • Sun LJ; Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516003, China.
  • Liang PF; Department of Physics, Kyushu Sangyo University, Fukuoka 813-8503, Japan.
  • Li ZH; CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
  • Li J; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Wu HY; School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
  • Fang DQ; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Wang JS; College of Physics and Technology, Guangxi Normal University, Guilin 541004, China.
  • Yang YY; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Yuan CX; School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
  • Lam YH; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Wang YT; Department of Physics, The University of Hong Kong, Hong Kong, China.
  • Wang K; School of Physic and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.
  • Wang JG; School of Physic and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.
  • Ma JB; School of Physic and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.
  • Liu JJ; Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China.
  • Li PJ; Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
  • Zhao QQ; CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
  • Yang L; University of Chinese Academy of Sciences, Beijing 100049, China.
  • Ma NR; School of Science, Huzhou University, Huzhou 313000, China.
  • Wang DX; CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
  • Zhong FP; University of Chinese Academy of Sciences, Beijing 100049, China.
  • Zhong SH; Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China.
  • Yang F; CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
  • Jia HM; Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
  • Wen PW; Institute of Particle and Nuclear Physics, Henan Normal University, Xinxiang, 453007, China.
  • Pan M; CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
  • Zang HL; Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
  • Wang X; CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
  • Wu CG; CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
  • Luo DW; Department of Physics, The University of Hong Kong, Hong Kong, China.
  • Wang HW; CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
  • Li C; Department of Physics, The University of Hong Kong, Hong Kong, China.
  • Shi CZ; Department of Physics, The University of Hong Kong, Hong Kong, China.
  • Nie MW; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Li XF; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Li H; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Ma P; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Hu Q; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Shi GZ; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Jin SL; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Huang MR; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Bai Z; Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China.
  • Zhou YJ; School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China.
  • Ma WH; School of Physic and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.
  • Duan FF; School of Physic and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.
Phys Rev Lett ; 125(19): 192503, 2020 Nov 06.
Article in En | MEDLINE | ID: mdl-33216609
ABSTRACT
ß-delayed one-proton emissions of ^{22}Si, the lightest nucleus with an isospin projection T_{z}=-3, are studied with a silicon array surrounded by high-purity germanium detectors. Properties of ß-decay branches and the reduced transition probabilities for the transitions to the low-lying states of ^{22}Al are determined. Compared to the mirror ß decay of ^{22}O, 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 s_{1/2} orbit that introduces explicitly the isospin-symmetry breaking force and describes the loosely bound nature of the wave functions of the s_{1/2} 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 ^{22}Al. Our results, while supporting the proton-halo structure in ^{22}Al, might provide another means to identify halo nuclei.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2020 Document type: Article Affiliation country:
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2020 Document type: Article Affiliation country: