In this paper, odd-A nuclei in the vibrational to γ-soft transitional region are studied in the collective model, in which the odd-A system is described by the Bohr Hamiltonian with the quasi exactly solvable sextic β-part potential for the even-even core coupled with a single nucleon in a $j=3/2$ orbit via the β-independent five-dimensional spin-orbit interaction and the total angular momentum degeneracy breaking term. To test the validity of the coupling scheme, we use the model to reproduce experimentally available level energies and B(E2) values of ^{187,189,191,193,195}Ir. It is clearly shown from both the level energies and the known B(E2) values for ^191,193Ir fitted that the model with the β-independent five-dimensional spin-orbit interaction and the total angular momentum degeneracy breaking term seems adequate to describe the low-lying level pattern and the structure of these odd-A nuclei.

本文在集体模型中研究了从振动到γ-软过渡区域的奇A核，其中Bohr Hamiltonian描述了奇A系统，偶性的准可解性β-部分势为准偶核与单个核子耦合$Ĵ=3/2$通过独立于β的五维自旋轨道相互作用和总角动量简并性破坏项来进行轨道运动。为了测试耦合方案的有效性，我们使用该模型来重现实验可用的能级能量和^{187,189,191,193,195} Ir的B（E2）值。从^191,193 Ir的能级能量和已知的B（E2）值可以^清楚地看出，具有独立于β的五维自旋轨道相互作用和总角动量简并性破坏项的模型似乎足以描述低层级模式和这些奇数A核的结构。