Electric moments and charge deformation parameters in Sm 1 5 2 , 1 5 4 , Gd 156 , and Er 166
Electric moments and charge deformation parameters in Sm 1 5 2 , 1 5 4 , Gd 156 , and Er 166
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DOI：
10.1103/physrevc.15.921
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发表时间：
1977-03
影响因子：
3.1
通讯作者：
H. Fischer;D. Kamke;H. J. Kittling;E. Kuhlmann;H. Plicht;R. Schormann
中科院分区：
文献类型：
--
作者：
H. Fischer;D. Kamke;H. J. Kittling;E. Kuhlmann;H. Plicht;R. Schormann
用$\ensuremath{\alpha}$粒子对4个稀土原子核$^{152,154}\mathrm{Sm}$、$^{156}\mathrm{Gd}$和$^{166}\mathrm{Er}$进行了库仑激发实验。得到了旋转基态带低洼能级的跃迁矩阵元$E2$和$E4$。假设具有漫射表面的变形费米分布，提取与模型相关的电荷变形参数${\ensuremath{\beta}}_{2}^{c}$和${\ensuremath{\beta}}_{4}^{c}$。在$^{154}\mathrm{Sm}$中观察到的电荷和核的六极体变形之间可能存在的差异在等同音$^{156}\mathrm{Gd}$中没有出现。
Coulomb excitation experiments with $\ensuremath{\alpha}$ particles were performed on the four rare-earth nuclei $^{152,154}\mathrm{Sm}$, $^{156}\mathrm{Gd}$, and $^{166}\mathrm{Er}$. $E2$ and $E4$ transition matrix elements of low-lying levels in the rotational ground-state bands were obtained. Model dependent charge deformation parameters ${\ensuremath{\beta}}_{2}^{c}$ and ${\ensuremath{\beta}}_{4}^{c}$ were extracted assuming a deformed Fermi distribution with diffuse surface. The possible difference between charge and nuclear hexadecapole deformation observed in $^{154}\mathrm{Sm}$ does not show up in the isotone $^{156}\mathrm{Gd}$.