Consistent description of nuclear charge radii and electric monopole transitions
Consistent description of nuclear charge radii and electric monopole transitions
复制标题
核电荷半径和电单极跃迁的一致描述
DOI：
10.1103/physrevc.85.034331
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发表时间：
2012
影响因子：
3.1
通讯作者：
A. Bouldjedri
中科院分区：
文献类型：
--
作者：
S. Zerguine;P. Isacker;A. Bouldjedri
在相互作用玻色子模型（IBM）框架下，对稀土区（从58 Ce到74 W的偶偶核）的能谱进行了系统的研究，精确地描述了不同同位素链的球形到形变的形状转变。由此产生的IBM哈密顿量，然后用于计算核电荷半径（包括同位素和异构体的位移）和电的质子转移与一致的运营商的两个观测。这项研究的主要结论是，IBM描述的电荷半径和电子跃迁是可能的大多数核考虑，但它打破了钨同位素。这一破坏与十六极变形有关。
A systematic study of energy spectra throughout the rare-earth region (even-even nuclei from $_{58}$Ce to $_{74}$W) is carried out in the framework of the interacting boson model (IBM), leading to an accurate description of the spherical-to-deformed shape transition in the different isotopic chains. The resulting IBM Hamiltonians are then used for the calculation of nuclear charge radii (including isotope and isomer shifts) and electric monopole transitions with consistent operators for the two observables. The main conclusion of this study is that an IBM description of charge radii and electric monopole transitions is possible for most of the nuclei considered but that it breaks down in the tungsten isotopes. It is suggested that this failure is related to hexadecapole deformation.