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
ISSN0031-9007
Volume125Issue:19
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.
DOI10.1103/PhysRevLett.125.192503
Indexed BySCIE
Language英语
Funding ProjectMinistry of Science and Technology of China under the National Key RD Programs[2018YFA0404404][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][U1632136][11635015][11805120][11705244][U1432246][11775316][U1732145][11705285][U1867212][11805280][11825504][11675229][11490562] ; Continuous Basic Scientific Research Project[WDJC-2019-13]
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000585709000004
PublisherAMER PHYSICAL SOC
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/441307
Collection兰州大学
Corresponding AuthorLee, J.
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
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
First Author AffilicationSchool of Physical Sicence and Technology
Corresponding 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[J]. PHYSICAL REVIEW LETTERS,2020,125(19).
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).
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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