The permanent electric dipole moment of thorium sulfide, ThS.
The permanent electric dipole moment of thorium sulfide, ThS.
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DOI：
10.1063/1.4861045
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发表时间：
2014-01
期刊：
影响因子：
--
通讯作者：
Anh T. Le;M. Heaven;T. Steimle
中科院分区：
文献类型：
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作者：
Anh T. Le;M. Heaven;T. Steimle
硫化钍 (ThS) 的 {18.26}1-X(1)Σ(+) 能带系统的许多旋转线在 547.6 nm 附近以大约 30 MHz 的分辨率被记录。测量是在无场条件下且存在静电场的情况下进行的。分析无场光谱以产生旋转和Λ倍频参数。分析电场引起的斯塔克位移，确定 X(1)Σ(+) (v = 0) 和 {18.26}1 态的永久电偶极矩 μ⃗el 分别为 4.58(10) D 和 6.72(5) D。结果与先前和新的 ThS 电子结构计算的预测以及等价 ThO 的性质进行了比较。
Numerous rotational lines of the {18.26}1-X(1)Σ(+) band system of thorium sulfide, ThS, were recorded near 547.6 nm at a resolution of approximately 30 MHz. Measurements were made under field-free conditions, and in the presence of a static electric field. The field-free spectrum was analyzed to produce rotational and Λ-doubling parameters. The Stark shifts induced by the electric field were analyzed to determine permanent electric dipole moments, μ⃗el, of 4.58(10) D and 6.72(5) D for the X(1)Σ(+) (v = 0) and {18.26}1 states, respectively. The results are compared with the predictions of previous and new electronic structure calculations for ThS, and the properties of isovalent ThO.