Abstract

An extended microscopic version of the interacting-boson model is developed. The properties of yrast-band states in even cerium isotopes up to the spin–parity of \(I^{\pi}=18^{+}\) are calculated on the basis of this model. These spin values include those at which band crossing occurs. The model parameters are calculated on the basis of employing an average spherical potential and residual multipole forces. An extension of the model is accomplished via taking into account high-spin quasiparticle pairs, whereby a satisfactory description of energies and \(B(E\text{2})\) values was obtained without introducing effective charges. The present investigation is a continuation of a similar analysis of the properties of low-lying collective states in even xenon and barium isotopes.

中文翻译：

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铈同位素中IBM1参数和能带穿越的理论计算

摘要

开发了相互作用玻色子模型的扩展微观版本。在此模型的基础上，计算了甚至自旋奇偶性的铈同位素中的拉谱带态的性质（\（I ^ {\ pi} = 18 ^ {+} \））。这些自旋值包括发生带交叉的值。在采用平均球形势和残余多极力的基础上计算模型参数。通过考虑高自旋准粒子对完成模型的扩展，从而在不引入有效电荷的情况下获得了令人满意的能量和\（B（E \ text {2}）\）值的描述。本研究是对氙和钡同位素中低洼集体态性质的相似分析的延续。