O VI中辐射跃迁的分支比
Branching ratios of radiative transitions in O VI
摘要：
我们用相对论耦合集团理论研究了OVI前几（9）个精细结构能级之间的允许和禁止辐射跃迁的分支比。我们发现不规则的模式与$n$ -复合物与$n\le4$的过渡数。我们用允许电偶极子（$E1$）跃迁的临界值作为我们理论的基准。与现有值的良好协议建立不仅理论方法的精度，但基函数以及。一般来说，电四极（$E2$）跃迁概率的大小大于磁偶极子（$M1$）跃迁概率，而对于中等原子跃迁频率，它们具有相同的数量级。另一方面，如果所涉及的跃迁是在同一项的两个精细结构分量之间，则$M1$跃迁概率比$E2$更可能。我们分析了这些趋势的物理参数和数量级估计。本文以表格和图形形式给出的结果与现有的理论和观测数据进行了比较。图形分析有助于理解这里介绍的衰变通道的电磁跃迁趋势。我们计算的激发态寿命值与已有的结果符合得很好。
英文摘要：
We study the branching ratios of the allowed and forbidden radiative transitions among the first few (9) fine structure levels of O VI using relativistic coupled cluster theory. We find irregular patterns for a number of transitions with in $n$-complexes with $n\le4$. We have used the exisiting values of the allowed electric dipole ($E1$) transition as a benchmark of our theory. Good agreement with the existing values establish accuracies of not only the theoretical method but the basis function as well. In general the electric quadrupole ($E2$) transition probabilities are greater in magnitude than magnetic dipole ($M1$) transition probabilities, whereas for medium atomic transition frequencies they are of the same order of magnitude. On the other hand if the transitions involved are between two fine structure components of the same term, then the $M1$ transition probability is more probable than that of $E2$. We have analyzed these trends with physical arguments and order of magnitude estimations. The results presented here in tabular and graphical forms are compared with the available theoretical and observed data. Graphical analysis helps to understand the trends of electric and magnetic transitions for the decay channels presented here. Our calculated values of the lifetimes of the excited states are in very good agreement with the available results.
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