摘要
用处理推转壳模型的粒子数守恒 (PNC)方法 ,分析了稀土变形核1 72 ,1 74Hf的基态带和低激发高K多准粒子带的运动学转动惯量J(1 ) 随角频率ω的变化及其微观机制 ,特别是被拆散核子的Pauli堵塞效应的重要影响 .实验观测到的J(1 ) 和顺排角动量随角频率的变化在PNC计算中得到较好的重现 .计算中无自由参数 .分析表明 ,高K多准粒子带的J(1 ) 随ω的变化与基态带不同 ,主要来自高N(j)闯入态的堵塞效应 .
Using the particle-number conserving method for treating the cranked shell model, the microscopic mechanism of the variation of the kinematic moments of inertia with rotational frequency ω for the rare-earth deformed nuclei 172,174Hf is investigated. The observed J(1) and angular momentum alignment are reproduced satisfactorily in the PNC calculation, in which no free parameters are involved. The PNC analysis shows that the difference between the variations of J(1) with ω for the high K multi-quasiparticle bands and for ground state band is mainly due to the Pauli blocking effect of high j intruder orbitals near the Fermi surface.
出处
《高能物理与核物理》
EI
CSCD
北大核心
2002年第2期164-171,共8页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金 ( 1 0 0 4 70 0 1 )~~
