Systematic study of multi-quasiparticle K-isomeric bands in tungsten isotopes by the extended projected shell model
文献类型：期刊论文
| 作者 | Wu, Xin-Yi1,2; Ghorui, S. K.1,2; Wang, Long-Jun1,6; Sun, Yang1,2,3; Guidry, Mike4; Walker, Philip M.5 |
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2017-06-16 |
| 卷号 | 95页码:17 |
| ISSN号 | 2469-9985 |
| DOI | 10.1103/PhysRevC.95.064314 |
| 英文摘要 | Background: The interplay between collective and single-particle degrees of freedom is an important structure aspect to study. The nuclei in theA approximate to 180 mass region are often denoted as good examples to study such problems because these nuclei are known to exhibit many rotational bands based on multi-quasiparticle K isomers. Purpose: A large set of high-quality experimental data on high-K isomeric states in the A approximate to 180 mass region has accumulated. A systematic description of them is a theoretical challenge as it requires a method going beyond the usual mean field with multi-quasiparticle configurations built in the shell-model basis. The K-isomer data provide an ideal testing ground for theoretical models. Method: The recently extended projected shell model (PSM) by the Pfaffian method is employed with a sufficiently large configuration space including up to 10 quasiparticles. The restoration of rotational symmetry which is broken in the deformed mean field is obtained by means of angular-momentum projection. With axial symmetry in the basis deformation, each multi-quasiparticle state, classified by a K quantum number, represents the major component of a rotational K band. Shell-model diagonalization in such a projected basis defines the K mixing, which is the key ingredient of the present method. Results: Quasiparticle structure and rotational properties of high-K isomers in even-even neutron-rich 174-186W isotopes are described. The rotational evolution of the yrast and near-yrast bands is discussed with successive band crossings. Multi-quasiparticle K isomers and associated rotational bands in each W isotope are studied with detailed quasiparticle configurations given. Electromagnetic transition properties are also studied and the calculated B(E2), B(M1), and g-factors are compared with experiment if data exist. Conclusions: Many nuclei of the A approximate to 180 mass region exhibit properties of an axially symmetric shape and K is approximately a good quantum number. For such nuclei, the extended PSM assuming an axially symmetric basis but including K mixing through diagonalization of the two-body Hamiltonian is an appropriate method to study multi-quasiparticle K isomers and K violations in these states. For special examples where one finds highly K-forbidden transitions the present model needs to be further improved. |
| WOS关键词 | NUCLEAR-DATA SHEETS ; AXIS CRANKING MODEL ; HIGH-SPIN STATES ; ROTATIONAL BANDS ; MATRIX-ELEMENTS ; MOMENTS ; W-182 |
| 资助项目 | National Natural Science Foundation of China[11575112] ; National Key Program for S&T Research and Development[2016YFA0400501] ; 973 Program of China[2013CB834401] ; UK Science and Technology Facilities Council[ST/L005743/1] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000403492200001 |
| 资助机构 | National Natural Science Foundation of China ; National Key Program for S&T Research and Development ; 973 Program of China ; UK Science and Technology Facilities Council |
| 源URL | [http://119.78.100.186/handle/113462/45046]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Sun, Yang |
| 作者单位 | 1.Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China 2.Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA, Shanghai 200240, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 4.Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA 5.Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England 6.Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27516 USA |
| 推荐引用方式 GB/T 7714 | Wu, Xin-Yi,Ghorui, S. K.,Wang, Long-Jun,et al. Systematic study of multi-quasiparticle K-isomeric bands in tungsten isotopes by the extended projected shell model[J]. PHYSICAL REVIEW C,2017,95:17. |
| APA | Wu, Xin-Yi,Ghorui, S. K.,Wang, Long-Jun,Sun, Yang,Guidry, Mike,&Walker, Philip M..(2017).Systematic study of multi-quasiparticle K-isomeric bands in tungsten isotopes by the extended projected shell model.PHYSICAL REVIEW C,95,17. |
| MLA | Wu, Xin-Yi,et al."Systematic study of multi-quasiparticle K-isomeric bands in tungsten isotopes by the extended projected shell model".PHYSICAL REVIEW C 95(2017):17. |
入库方式： OAI收割
来源：近代物理研究所
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