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arXiv 1908.03322nucl-thnucl-ex
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基于Gogny-D1M能量密度泛函的相互作用玻色子-费米子-费米子模型中奇-奇Cs同位素的结构

Structure of odd-odd Cs isotopes within the interacting boson-fermion-fermion model based on the Gogny-D1M energy density functional

K. Nomura, R. Rodríguez-Guzmán, L. M. Robledo

摘要:

在Gogny-D1 M能量密度泛函框架下,采用玻色子-费米子-费米子相互作用模型,研究了$^{124-132}$ Cs的奇偶同位素光谱性质.本文用约束Hartree-Fock-Bogoliubov方法从微观上计算了构成玻色子-费米子-费米子相互作用哈密顿量的主要成分,如偶偶核$^{124-132}$的($β,γ$)-形变能面以及奇核子的单粒子能量和占据几率.本文拟合了玻色子-费米子和剩余中子-质子相互作用的几个耦合常数,以合理的精度再现了奇质量核和奇-奇核低能级的实验激发能。该方法主要基于$(νh_{11/2})^{-1}\otimesπh_{11/2}$组态,用于描述奇-奇Cs核的低能低自旋谱和高自旋高能态的能带结构.这些奇-奇Cs核中的许多已被确定为表现出手征双重带的候选者。

英文摘要:

The spectroscopic properties of the odd-odd isotopes $^{124-132}$Cs have been studied within the interacting boson-fermion-fermion model based on the Gogny-D1M energy density functional framework. Major ingredients to build the interacting boson-fermion-fermion Hamiltonian, such as the ($β,γ$)-deformation energy surfaces for the even-even core nuclei $^{124-132}$Xe as well as single-particle energies and occupation probabilities of the odd nucleons, have been computed microscopically with the constrained Hartree-Fock-Bogoliubov method. A few coupling constants of the boson-fermion and residual neutron-proton interactions are fitted to reproduce with a reasonable accuracy the experimental excitation energy of the low-lying levels of the odd-mass and odd-odd nuclei. The method is applied to describe the low-energy low-spin spectra of the odd-odd Cs nuclei and the band structures of higher-spin higher-energy states, mainly based on the $(νh_{11/2})^{-1}\otimesπh_{11/2}$ configuration. Many of those odd-odd Cs nuclei have been identified as candidates for exhibiting chiral doublet bands.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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