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arXiv 1607.02771nucl-thnucl-ex
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$N<126$ Pb同位素光谱的大尺度壳模型计算

Large-scale shell-model calculations on the spectroscopy of $N<126$ Pb isotopes

Chong Qi, L. Y. Jia, G. J. Fu

摘要:

在包括中子空穴轨道$2p_{1/2}$、$1f_{5/2}$、$2p_{3/2}$、$0i_{13/2}$、$1f_{7/2}$和$0h_{9/2}$的模型空间中进行了大尺度壳模型计算,研究了缺中子Pb同位素的结构和电磁性质.使用优化的有效交互。对同位素$^{194-206}$ Pb的球形态进行了全壳层模型计算,计算结果与实验数据吻合较好。较轻的同位素计算的重要性截断方法的基础上构建的哈密顿量。全壳模型的计算结果也与我们的广义论资和核子对近似截断计算结果符合得很好。理论与实验之间关于低激发态$0^+$和$2^+$激发态和同分异构态的激发能和电磁性质的偏差可能会限制我们对该区域核形变和入侵组态的理解。

英文摘要:

Large-scale shell-model calculations are carried out in the model space including neutron-hole orbitals $2p_{1/2}$, $1f_{5/2}$, $2p_{3/2}$, $0i_{13/2}$, $1f_{7/2}$ and $0h_{9/2}$ to study the structure and electromagnetic properties of neutron deficient Pb isotopes. An optimized effective interaction is used. Good agreement between full shell-model calculations and experimental data is obtained for the spherical states in isotopes $^{194-206}$Pb. The lighter isotopes are calculated with an importance-truncation approach constructed based on the monopole Hamiltonian. The full shell-model results also agree well with our generalized seniority and nucleon-pair-approximation truncation calculations. The deviations between theory and experiment concerning the excitation energies and electromagnetic properties of low-lying $0^+$ and $2^+$ excited states and isomeric states may provide a constraint on our understanding of nuclear deformation and intruder configuration in this region.

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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