Isospin-symmetry breaking in superallowed Fermi beta-decay due to isospin-nonconserving forces
文献类型：期刊论文
| 作者 | Kaneko, K.1; Sun, Y.2,3,4; Mizusaki, T.5; Tazaki, S.6; Ghorui, S. K.2,3 |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2017-10-10 |
| 卷号 | 773页码:521-526 |
| 关键词 | Isospin-symmetry breaking Isospin-nonconserving interaction Superallowed Fermi beta-decay Coulomb displacement energy Triplet displacement energy Proton drip-line |
| ISSN号 | 0370-2693 |
| DOI | 10.1016/j.physletb.2017.08.056 |
| 英文摘要 | We investigate isospin-symmetry breaking effects in the sd-shell region with large-scale shell-model calculations, aiming to understand the recent anomalies observed in superallowed Fermi beta-decay. We begin with calculations of Coulomb displacement energies (CDE's) and triplet displacement energies (TDE's) by adding the T = 1, J = 0 isospin nonconserving (INC) interaction into the usual isospin-invariant Hamiltonian. It is found that CDE's and TDE's can be systematically described with high accuracy. A total number of 122 one- and two-proton separation energies are predicted accordingly, and locations of the proton drip-line and candidates for proton-emitters are thereby suggested. However, attempt to explain the anomalies in the superallowed Fermi beta-decay fails because these well-fitted T = 1, J = 0 INC interactions are found no effects on the nuclear matrix elements. It is demonstrated that the observed large isospin-breaking correction in the Cl-32 beta-decay, the large isospin-mixing in the Cl-31 beta-decay, and the small isospin-mixing in the Al-23 beta-decay can be consistently understood by introducing additional T = 1, J = 2 INC interactions related to the s(1/2) orbit. (C) 2017 The Author(s). Published by Elsevier B.V. |
| WOS关键词 | COULOMB ENERGIES ; NUCLEI |
| 资助项目 | National Key Research and Development Program[2016YFA0400501] ; National Natural Science Foundation of China[11575112] ; 973 Program of China[2013CB834401] |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000413294200078 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Key Research and Development Program ; National Natural Science Foundation of China ; 973 Program of China |
| 源URL | [http://119.78.100.186/handle/113462/45912]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Sun, Y. |
| 作者单位 | 1.Kyushu Sangyo Univ, Dept Phys, Fukuoka 8138503, Japan 2.Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China 3.Shanghai Jiao Tong Univ, Collaborat Innovat Ctr, IFSA, Shanghai 200240, Peoples R China 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 5.Senshu Univ, Inst Nat Sci, Tokyo 1018425, Japan 6.Fukuoka Univ, Dept Appl Phys, Fukuoka 8140180, Japan |
| 推荐引用方式 GB/T 7714 | Kaneko, K.,Sun, Y.,Mizusaki, T.,et al. Isospin-symmetry breaking in superallowed Fermi beta-decay due to isospin-nonconserving forces[J]. PHYSICS LETTERS B,2017,773:521-526. |
| APA | Kaneko, K.,Sun, Y.,Mizusaki, T.,Tazaki, S.,&Ghorui, S. K..(2017).Isospin-symmetry breaking in superallowed Fermi beta-decay due to isospin-nonconserving forces.PHYSICS LETTERS B,773,521-526. |
| MLA | Kaneko, K.,et al."Isospin-symmetry breaking in superallowed Fermi beta-decay due to isospin-nonconserving forces".PHYSICS LETTERS B 773(2017):521-526. |
入库方式： OAI收割
来源：近代物理研究所
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