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Ya, Tu; Chen, Yong-Jing; Chen, Yong-Shou; Gao, Zao-Chun; Liu, Ling
Axial shape asymmetry and high-spin states in nuclei with Z=100 suggested by the projected total energy surface approach
Source PublicationPHYSICAL REVIEW C
Language英语
KeywordSPECTROSCOPY DEFORMATION
AbstractThe axial-shape asymmetry of yrast states in Fm246-256 is studied by performing the projected total-energy surface (PTES) calculations, which consider the beyond-mean-field effects associated with the restoration of rotational symmetry and shape variation at the same time. The results show a large elongation deformation but also a considerable large triaxiality for their ground and high spin states, the triaxial deformation gamma approximate to 11 degrees in average. In comparison, the TRS calculations have also been performed for these nuclei, and the results show a well-established axial quadrupole shape in their ground states. The presence of the significant triaxial deformation can be attributed to the beyond-mean-field effects generated by the angular-momentum projection. The axial asymmetric shape for the yrast states of nuclei with Z = 100, suggested by the present variation after projection (VAP) calculations, indicates that the triaxial degree of freedom may also play a significant role in other transfermium and even superheavy nuclei. The present PTES calculations have well reproduced the available experimental energies of the ground-band states and predict the rest yrast states up to spin 30 in each nucleus. The calculated yrast bands of Fm246-256 present the back bending phenomenon at about the state 18+, caused by the alignment excitations of the two quasiparticle neutrons of nu j(15/2)[743]7/2 or of nu h(11/2)[761]1/2. It is worth confirming the predicted band structures by the future spectroscopic experiments in the transfermium nuclei for the study of the single-particle structure in the superheavy mass region.
2021
ISSN2469-9985
Volume104Issue:1Pages:14306
Cooperation Status国内
Subject AreaPhysics
MOST Discipline CataloguePhysics, Nuclear
DOI10.1103/PhysRevC.104.014306
Indexed BySCIE
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27272
CollectionSCI期刊论文
Affiliation1.Shenyang Normal Univ, Sch Phys Sci & Technol, Shenyang 110034, Peoples R China
2.China Inst Atom Energy, China Nucl Data Ctr, Beijing 102413, Peoples R China
3.China Inst Atom Energy, Beijing 102413, Peoples R China
4.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Ya, Tu,Chen, Yong-Jing,Chen, Yong-Shou,et al. Axial shape asymmetry and high-spin states in nuclei with Z=100 suggested by the projected total energy surface approach[J]. PHYSICAL REVIEW C,2021,104(1):14306.
APA Ya, Tu,Chen, Yong-Jing,Chen, Yong-Shou,Gao, Zao-Chun,&Liu, Ling.(2021).Axial shape asymmetry and high-spin states in nuclei with Z=100 suggested by the projected total energy surface approach.PHYSICAL REVIEW C,104(1),14306.
MLA Ya, Tu,et al."Axial shape asymmetry and high-spin states in nuclei with Z=100 suggested by the projected total energy surface approach".PHYSICAL REVIEW C 104.1(2021):14306.
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