稀土变形奇A核^(173,175)Hf的多准粒子高K转动带的粒子数守恒分析

Particle-Number Conserving Analysis for High K Multi-Quasiparticle Bands in Odd-A Deformed Nuclei^(173,175)Hf

用处理推转壳模型的粒子数守恒方法分析了稀土奇A变形核173,175 Hf的3准粒子和 5准粒子高K转动带 ,包括转动惯量、顺排角动量 ,以及推转Nilsson能级上的粒子填布几率随转动角频率的变化 .计算中无自由参数 .实验观测结果在计算中得到较好地重现 .分析了多准粒子带与相邻偶偶核基态带的转动惯量变化规律不同的微观机制 .

Using the Particle-number Conserving (PNC) method for treating the cranked shell model, the high K multi-quasiparticle bands in odd-A deformed nuclei 173,175 Hf are analyzed, including the variation with rotational frequency of the moment of inertia, angular momentum alignment and occupation probability of each cranked Nilsson orbital. No free parameters are involved in the PNC calculation and the experimental results are reproduced well. The microscopic mechanism of the difference between the multi-quasiparticle high K bands and the yrast bands in neighboring even-even nuclei is investigated, where the blocking effects of high j intruder orbitals near the Fermi surface play a crucial role.