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Description of odd-mass nuclei within the interacting boson-fermion model based on the Gogny energy density functional

机译:基于Gogny能量密度泛函的玻色子-费米子相互作用模型中奇质量核的描述

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摘要

Spectroscopic properties of odd-mass nuclei are studied within the framework of the interacting boson-fermion model (IBFM) with parameters based on the Hartree-Fock-Bogoliubov (HFB) approximation. The parametrization D1M of the Gogny energy density functional (EDF) was used at the mean-field level to obtain the deformation energy surfaces for the considered nuclei in terms of the quadrupole deformations (β,γ). In addition to the energy surfaces, both single-particle energies and occupation probabilities were used as a microscopic input for building the IBFM Hamiltonian. Only three strength parameters for the particle-boson-core coupling are fitted to experimental spectra. The IBFM Hamiltonian is then used to compute the energy spectra and electromagnetic transition rates for selected odd-mass Eu and Sm nuclei as well as for 195Pt and 195Au. A reasonable agreement with the available experimental data is obtained for the considered odd-mass nuclei.
机译:在具有基于Hartree-Fock-Bogoliubov(HFB)近似的参数的相互作用玻色子-费米子模型(IBFM)的框架内,研究了奇质量核的光谱性质。在平均场水平上使用Gogny能量密度函数(EDF)的参数化D1M,以四极杆形变(β,γ)的形式获得所考虑核的形变能面。除了能量表面以外,单粒子能量和占有概率都被用作构建IBFM哈密顿量的微观输入。用于粒子-玻色子-核心耦合的三个强度参数仅拟合到实验光谱。然后,IBFM哈密顿量用于计算选定奇质量数Eu和Sm原子核以及195Pt和195Au的能谱和电磁跃迁速率。对于所考虑的奇质量核,可以获得与可用实验数据的合理一致性。

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