Theoretical investigation of the antimagnetic rotation in Pd-104
Theoretical investigation of the antimagnetic rotation in Pd-104
复制标题
104Pd反磁旋转的理论研究
DOI：
10.1088/1674-1137/43/5/054107
复制
发表时间：
2019
影响因子：
3.6
通讯作者：
Zhen-Hua Zhang
中科院分区：
文献类型：
--
作者：
Zhen-Hua Zhang
本文采用基于推转壳模型的粒子数守恒方法研究了$^{104}$Pd的反磁转动带。实验的转动惯量和约化的B（E2）$跃迁几率都得到了很好的再现。还讨论了J^{（2）}/B（E2）的比值。分析了费米面附近各轨道的占据几率以及各主壳层对总角动量随转动频率排列的贡献。明确了$^{104}$Pd基态带的回弯机制，阐明了回弯后反磁转动的组态。此外，还预言了四个准粒子态与这个反磁转动带的交叉。通过研究四质子空穴角动量向中子角动量的闭合，研究了这种反磁转动的“双剪切”机制，清楚地看到了$^{104}$Pd的反磁转动的两个阶段。
The particle-number-conserving method based on the cranked shell model is used to investigate the antimagnetic rotation band in $^{104}$Pd. The experimental moments of inertia and reduced $B(E2)$ transition probabilities are reproduced well. The $J^{(2)}/B(E2)$ ratios are also discussed. The occupation probability of each orbital close to the Fermi surface and the contribution of each major shell to the total angular momentum alignment with rotational frequency are analyzed. The backbending mechanism of the ground state band in $^{104}$Pd is understood clearly and the configuration of the antimagnetic rotation after backbending is clarified. In addition, the crossing of a four quasiparticle states with this antimagnetic rotation band is also predicted. By examining the the closing of the four proton hole angular momenta towards the neutron angular momenta, the "two-shears-like" mechanism for this antimagnetic rotation is investigated and two stages of antimagnetic rotation in $^{104}$Pd are seen clearly.