摘要
应用唯象核芯加两准粒子模型的一种微观实现(sdIBM-2+2q.p.)方案并考虑到实验单粒子能量,较成功地再现了偶64～68Ge核的基态带、β带、γ带和部分高自旋态能谱.基于唯象模型和微观方案求出了s玻色子不拆对和一个d玻色子发生拆对顺排所需要的最小能量值.该阈值明确指认:随着中子数的增加,偶Ge同位素可能发生从64Ge核的两准质子顺排态向68Ge核的两准中子顺排态的演化;揭示了偶Ge同位素对相变对象转移的演化过程.
By using a microscopic sdIBM-2+2q.p. approach which is the accomplishment of the phenomenological core plus two-quasi-particle model and the experimental single-particle energies, the levels of the ground-band, β-band, γ-band, and partial two-quasi-particle states on ^(64^68)Ge isotopes are successfully reproduced. Based on the phenomenological model and microscopic approach, it has been deduced that no s-boson in the nucleus occupies breaking pair and aligning; and that when one d-boson does, the minimum aligned energy required is obtained. The threshold value explicitly indicates that with the increase of neutron number, it may take place in even Ge isotopes that the situation evolves from the two-quasi-proton states on ^(64)Ge nucleus to the two-quasi-neutron states on ^(68)Ge nucleus. In this paper, the process of the evolution of the objects of the pair phase transition on even Ge isotopes is revealed.
出处
《华中师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第4期433-436,共4页
Journal of Central China Normal University：Natural Sciences
基金
贵州省科技基金资助项目([2002]3025).
关键词
对相变
低能谱
高自旋态
偶^64-68Ge同位素
pair phase transition
low-energy spectra
high-spin state
even ^(64^68)Ge isotopes
