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arXiv 1007.0311nucl-th
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用相互作用玻色子模型描述A $\sim$ 100质量区的核

Description of nuclei in the A$\sim$100 mass region with the interacting boson model

M. Böyükata, P. Van Isacker, I. Uluer

摘要:

在相互作用玻色子模型-1({IBM-1})的框架下研究了$A\sim100$质量区的偶-偶核.研究内容包括中子数为$N\geq52$的锆、钼、钌和钯同位素的能谱和电四极跃迁性质。一个全局参数化的{IBM-1}哈密顿量被发现导致约300个集体能级的描述,在30个核的均方根偏离观察到的能级能量为120 keV。指出了中子数N=56时$d_{5/2}$子壳层闭合的重要性。由经典极限下的{IBM-1}哈密顿量得到的势能面$V(β,γ)$可以直观地显示原子核的几何特征。基于已知元素建立的参数化用于预测未知的富中子同位素$^{106}$ Zr、$^{112}$ Mo、$^{116}$ Ru和$^{122}$ Pd的性质。

英文摘要:

Even--even nuclei in the $A\sim100$ mass region are investigated within the framework of the interacting boson model-1 ({IBM-1}). The study includes energy spectra and electric quadrupole transition properties of zirconium, molybdenum, ruthenium and palladium isotopes with neutron number $N\geq52$. A global parametrization of the {IBM-1} Hamiltonian is found leading to a description of about 300 collective levels in 30 nuclei with a root-mean-square deviation from the observed level energies of 120 keV. The importance of the $d_{5/2}$ subshell closure at neutron number N=56 is pointed out. The geometric character of the nuclei can be visualized by plotting the potential energy surface $V(β,γ)$ obtained from the {IBM-1} Hamiltonian in the classical limit. The parametrization established on the basis of known elements is used to predict properties of the unknown, neutron-rich isotopes $^{106}$Zr, $^{112}$Mo, $^{116}$Ru and $^{122}$Pd.

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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