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arXiv 1609.09614nucl-thnucl-ex
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基于Gogny能量密度泛函的映射相互作用玻色子模型下$A\approx 100$核的结构演化

Structural evolution in $A\approx 100$ nuclei within the mapped interacting boson model based on the Gogny energy density functional

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

摘要:

在基于Gogny-D1 M能量密度泛函的自洽平均场近似下,采用微观输入的相互作用玻色子模型(IBM)研究了$A\approx 100$质量区偶偶丰中子核Ru,Mo,Zr和Sr的结构.在四极形变空间$(β,γ)$的变形能面,计算的约束Hartree-Fock-Bogoliubov框架内,映射到适当选择的IBM哈密顿与配置混合玻色子凝聚态的期望值。利用映射的IBM哈密顿量研究了$^{98-114}$ Ru、$^{96-112}$ Mo、$^{94-110}$ Zr和$^{92-108}$ Sr的光谱性质,预测了Ru和Mo核的几种$γ$ -软行为,同时发现Zr和Sr核的强扁长形变和弱扁扁形变形状明显共存.该方法很好地描述了实验yrast和非yrast态的演化以及选择的$B$(E 2)跃迁几率。

英文摘要:

The structure of even-even neutron-rich Ru, Mo, Zr and Sr nuclei in the $A\approx 100$ mass region is studied within the interacting boson model (IBM) with microscopic input from the self-consistent mean-field approximation based on the Gogny-D1M energy density functional. The deformation energy surface in the quadrupole deformation space $(β,γ)$, computed within the constrained Hartree-Fock-Bogoliubov framework, is mapped onto the expectation value of the appropriately chosen IBM Hamiltonian with configuration mixing in the boson condensate state. The mapped IBM Hamiltonian is used to study the spectroscopic properties of $^{98-114}$Ru, $^{96-112}$Mo, $^{94-110}$Zr and $^{92-108}$Sr. Several cases of $γ$-soft behavior are predicted in Ru and Mo nuclei while a pronounced coexistence between strongly-prolate and weakly-oblate deformed shapes is found for Zr and Sr nuclei. The method describes well the evolution of experimental yrast and non-yrast states as well as selected $B$(E2) transition probabilities.

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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