arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1408.3067physics.atom-phphysics.opticsquant-ph
收藏

Th,Th $^{+}$和Th $^{2+}$原子性质的相对论全级计算

Relativistic all-order calculations of Th, Th$^{+}$ and Th$^{2+}$ atomic properties

M. S. Safronova, U. I. Safronova, Charles W. Clark

摘要:

激发能,术语名称,和$g$ -因子的Th,Th $^{+}$和Th $^{2+}$确定使用相对论混合配置相互作用(CI)+全阶的方法,结合配置相互作用和线性化耦合簇方法。并与已有的理论和实验结果进行了比较。我们发现一些“消失”的$g$ -因素,类似于那些已知的镧系光谱。确定了Th $^{2+}$的约化矩阵元素、振子强度、跃迁速率和寿命。为了估计我们的结果的不确定性,我们比较了我们的值与现有的实验寿命更高的$5f7p\ ^3G_{4}$,$7s7p\ ^3P_{0}$,$7s7p\ ^3P_{1}$,和$6d7p\ ^3F_{4}$水平的Th $^{2+}$。这些计算提供了一个基准测试的CI+全阶方法的重系统与几个价电子和产生的过渡率和Th $^{2+}$的寿命的推荐值。

英文摘要:

Excitation energies, term designations, and $g$-factors of Th, Th$^{+}$ and Th$^{2+}$ are determined using a relativistic hybrid configuration interaction (CI) + all-order approach that combines configuration interaction and linearized coupled-cluster methods. The results are compared with other theory and experiment where available. We find some "vanishing" $g$-factors, similar to those known in lanthanide spectra. Reduced matrix elements, oscillator strengths, transition rates, and lifetimes are determined for Th$^{2+}$. To estimate the uncertainties of our results, we compared our values with the available experimental lifetimes for higher $5f7p\ ^3G_{4}$, $7s7p\ ^3P_{0}$, $7s7p\ ^3P_{1}$, and $6d7p\ ^3F_{4}$ levels of Th$^{2+}$. These calculations provide a benchmark test of the CI+all-order method for heavy systems with several valence electrons and yield recommended values for transition rates and lifetimes of Th$^{2+}$.

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。

↑