摘要
基于微观相互作用玻色子 -费米子形式体系 ,构造出唯象IBM - 1+ 2q .p模型的微观实现 ,微观sdIBM - 2 + 2q .p方案。应用它成功地再现了13 8Ce核的基态带 ,β带 ,γ带和部分高自旋态能谱。给出了近来实验上观察到该核有与单粒子态共存的集体性结构的一种解释。模型给出了一个玻色子从退耦 ,拆散 ,占据闯入轨道到参加顺排所需要的最小能量值。计算出的微观信息表明 :一个d玻色子的突然拆对不会引起核状态突变 ;核子顺排释放的能量有利于其它玻色子再拆对 ;13 8Ce核的高自旋态属于两准质子转动带。
In the view of microscopic interacting boson-fermion formalism, a microscopic realization, microscopic sdIBM-2 +2q.p approach has been formed for phenomenological IBM-1+2q.p model. It is used successfully to describe the ground state band, β-band, γ-band and partial two quasi-particle band for? 138 Ce nucleus. It can explain the recent experimental result that collective structure may coexist with the single-particle states in? 138 Ce nucleus. From that model, it may be calculated that minimum energy is needed by it, and a boson is make appearance firstly from decoupling, then breaking pair, in turn occupying intrusion orbit and finally jointing alignment. The microscopic information calculated shows that when broken pair of a boson takes place suddenly, no significant change of states between foremost state and latter state is caused by broken pain; the energy related by nucleons in alignment is favorable to other boson' broken pain, and the high-spin states of? 138 Ce nucleus reproduced belong two quasi-proton rotational band.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第10期136-138,142,共4页
Journal of Chongqing University
基金
贵州省科学技术基金 ([2 0 0 2 ] 3 0 2 5 )
贵州省教育厅自然科学基金资助 ([2 0 0 0 ] 5 18)
