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Large Isospin Asymmetry in Si-22/O-22 Mirror Gamow-Teller Transitions Reveals the Halo Structure of Al-22

文献类型：期刊论文

作者Lee, J.18; Xu, X. X.14,15,16,17,18; Kaneko, K.13; Sun, Y.1,16,17; Lin, C. J.12,16; Sun, L. J.1,11,16; Liang, P. F.18; Li, Z. H.9,10; Li, J.9,10; Wu, H. Y.9,10
刊名PHYSICAL REVIEW LETTERS
出版日期2020-11-05
卷号125期号:19页码:6
ISSN号0031-9007
DOI10.1103/PhysRevLett.125.192503
通讯作者Lee, J.(jleehc@hku.hk)
英文摘要beta-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.
WOS关键词BETA-DECAY ; SYMMETRY BREAKING ; LINE
资助项目Ministry of Science and Technology of China under the National Key RD Programs[2018YFA0404404] ; Ministry of Science and Technology of China under the National Key RD Programs[2016YFA0400501] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB34000000] ; Research Grants Council (RGC) of Hong Kong[GRF-17304720] ; National Natural Science Foundation of China[U1932206] ; National Natural Science Foundation of China[U1632136] ; National Natural Science Foundation of China[11635015] ; National Natural Science Foundation of China[11805120] ; National Natural Science Foundation of China[11705244] ; National Natural Science Foundation of China[U1432246] ; National Natural Science Foundation of China[11775316] ; National Natural Science Foundation of China[U1732145] ; National Natural Science Foundation of China[11705285] ; National Natural Science Foundation of China[U1867212] ; National Natural Science Foundation of China[11805280] ; National Natural Science Foundation of China[11825504] ; National Natural Science Foundation of China[11675229] ; National Natural Science Foundation of China[11490562] ; Continuous Basic Scientific Research Project[WDJC-2019-13]
WOS研究方向Physics
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000585709000004
资助机构Ministry of Science and Technology of China under the National Key RD Programs ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Research Grants Council (RGC) of Hong Kong ; National Natural Science Foundation of China ; Continuous Basic Scientific Research Project
源URL[http://119.78.100.186/handle/113462/139428]  
专题中国科学院近代物理研究所
通讯作者Lee, J.
作者单位1.Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China
2.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China
3.Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China
4.Henan Normal Univ, Inst Particle & Nucl Phys, Xinxiang 453007, Henan, Peoples R China
5.Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China
6.Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China
7.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
8.Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China
9.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
10.Peking Univ, Sch Phys, Beijing 100871, Peoples R China
推荐引用方式
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[J]. PHYSICAL REVIEW LETTERS,2020,125(19):6.
APA Lee, J..,Xu, X. X..,Kaneko, K..,Sun, Y..,Lin, C. J..,...&Ma, X. W..(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),6.
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):6.

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来源：近代物理研究所

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