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

doi:10.1103/PhysRevLett.125.192503

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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
刊名	PHYSICAL REVIEW LETTERS
	2020
卷号	125 期号:19 页码:-
关键词	BETA-DECAY SYMMETRY BREAKING LINE
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.125.192503
文献子类	期刊论文
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.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32972]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA 2.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 3.Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 5.Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China 6.Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China 7.Henan Normal Univ, Inst Particle & Nucl Phys, Xinxiang 453007, Henan, Peoples R China 8.Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China 9.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China 10.Peking Univ, Sch Phys, Beijing 100871, Peoples R China (1
推荐引用方式 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):-.