| Spectral property and its shape transition on ^72-84Kr isotopes in microscopic core plus two-quasiparticle approach |
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| 作者姓名： | 石筑一 赵行知 童红 |
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| 作者单位： | DepartmentofPhysics,OuizhouInstituteforNstlonalJtles,Ouiyang550025,Chins |
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| 摘 要： | By using a microscopic sdIBM-2 2q.p, approach, the levels of the ground-band, 7-band and partial two-quasi-particle bands for ^72-84Kr isotopes are calculated. The data obtained are in good agreement with the recent experimental results, and successfully reproduce the nuclear shape phase transition of ^72-S4Kr isotopes at zero temperature.The ground-state band is described successfully up to J^π=18^ and Ex=10.0MeV. Based on this model, the aligned requisite minimum energy has been deduced. The theoretical calculations indicate that no distinct change of nuclear states is caused by the abruptly broken pair of a boson, and predict that the first backbending of Kr isotopes may be the result of aligning of two quasi-neutrons in orbit g9/2, which galus the new experimental support of the measurements of g factors in the ^78-86Kr isotopes.
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| 关 键 词： | 光谱性质 氪同位素 高自旋态 相变 两准粒子近似 Kr同位素 原子核结构 |
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