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Large Isospin Asymmetry in Si-22/O-22 Mirror Gamow-Teller Transitions Reveals the Halo Structure of Al-22
Lee, J; Xu, XX; Kaneko, K; Sun, Y; Lin, CJ; Sun, LJ; Liang, PF; Li, ZH; Li, J; Wu, HY; Fang, DQ; Wang, JS; Yang, YY; Yuan, CX; Lam, YH; Wang, YT; Wang, K; Wang, JG; Ma, JB; Liu, JJ; Li, PJ; Zhao, QQ; Yang, L; Ma, NR; Wang, DX; Zhong, FP; Zhong, SH; Yang, F; Jia, HM; Wen, PW; Pan, M; Zang, HL; Wang, X; Wu, CG; Luo, DW; Wang, HW; Li, C; Shi, CZ; Nie, MW; Li, XF; Li, H; Ma, P; Hu, Q; Shi, GZ; Jin, SL; Huang, MR; Bai, Z; Zhou, YJ; Ma, WH; Duan, FF; Jin, SY; Gao, QR; Zhou, XH; Hu, ZG; Wang, M; Liu, ML; Chen, RF; Ma, XW
2020
Source PublicationPHYSICAL REVIEW LETTERS
ISSN0031-9007
Volume125Issue:19Pages:-
Subtype期刊论文
Abstractbeta-delayed one-proton emissions of Si-22, the lightest nucleus with an isospin projection T-z = -3, are studied with a silicon array surrounded by high-purity germanium detectors. Properties of beta-decay branches and the reduced transition probabilities for the transitions to the low-lying states of Al-22 are determined. Compared to the mirror beta decay of O-22, the largest value of mirror asymmetry in low-lying states by far, with delta = 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 delta value occurs for the first but not for the second 1(+) excited state of Al-22. Our results, while supporting the proton-halo structure in Al-22, might provide another means to identify halo nuclei.
KeywordBETA-DECAY SYMMETRY BREAKING LINE
DOI10.1103/PhysRevLett.125.192503
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32972
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Univ Hong Kong, Dept Phys, Hong Kong, Peoples R China
2.Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China
3.China Inst Atom Energy, Dept Nucl Phys, Beijing 102413, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Adv Energy Sci & Technol Guangdong Lab, Huizhou 516003, Peoples R China
6.Kyushu Sangyo Univ, Dept Phys, Fukuoka 8138503, Japan
7.Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China
8.Guangxi Normal Univ, Coll Phys & Technol, Guilin 541004, Peoples R China
9.Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA
10.Peking Univ, Sch Phys, Beijing 100871, Peoples R China (1
11.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
12.Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China
13.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
14.Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China
15.Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China
16.Henan Normal Univ, Inst Particle & Nucl Phys, Xinxiang 453007, Henan, Peoples R China
17.Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China
18.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China
Recommended Citation
GB/T 7714
Lee, J,Xu, XX,Kaneko, K,et al. Large Isospin Asymmetry in Si-22/O-22 Mirror Gamow-Teller Transitions Reveals the Halo Structure of Al-22[J]. PHYSICAL REVIEW LETTERS,2020,125(19):-.
APA Lee, J.,Xu, XX.,Kaneko, K.,Sun, Y.,Lin, CJ.,...&Ma, XW.(2020).Large Isospin Asymmetry in Si-22/O-22 Mirror Gamow-Teller Transitions Reveals the Halo Structure of Al-22.PHYSICAL REVIEW LETTERS,125(19),-.
MLA Lee, J,et al."Large Isospin Asymmetry in Si-22/O-22 Mirror Gamow-Teller Transitions Reveals the Halo Structure of Al-22".PHYSICAL REVIEW LETTERS 125.19(2020):-.
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