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arXiv 0707.3282physics.atom-phphysics.optics
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Sc III和Y III亚稳态寿命的理论测定

Theoretical determination of lifetimes of metastable states in Sc III and Y III

B. K. Sahoo, H. S. Nataraj, B. P. Das, R. K. Chaudhuri, D. Mukherjee

摘要:

用相对论耦合团簇理论计算了Sc ^{2 +}和Y ^{2 +}的前两个亚稳态的寿命。尽管这些离子的电子构型与中性碱金属原子相似,但它们的结构却与后者有很大的不同,因此研究它们的电子相关效应引起了人们的极大兴趣。我们对上述双电离体系与相应的中性和单电离等电子体系之间的关联趋势进行了比较研究。这些离子的激发态寿命在天体物理领域,特别是在研究冷巨星的后主序星演化中具有重要意义。

英文摘要:

Lifetimes of the first two metastable states in Sc^{2+} and Y^{2+} are determined using the relativistic coupled-cluster theory. There is a considerable interest in studying the electron correlation effects in these ions as though their electronic configurations are similar to the neutral alkali atoms, their structures are very different from the latter. We have made a comparative study of the correlation trends between the above doubly ionized systems with their corresponding neutral and singly ionized iso-electronic systems. The lifetimes of the excited states of these ions are very important in the field of astrophysics, especially for the study of post-main sequence evolution of the cool giant stars.

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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