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arXiv 1803.02449physics.chem-ph
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分子强场电离的耦合团簇处理

Coupled-cluster treatment of molecular strong-field ionization

Thomas-C. Jagau

摘要:

用耦合团簇方法计算了H $_2$,CO,O $_2$,H $_2$ O,CH $_4$在静态电场中的电离率和Stark位移.考虑电子相关性被发现是非常重要的,即使是一个定性正确的描述的依赖性的电离率和斯塔克位移的强度和方向的外部场。分子电荷分布的二阶矩的分析提出了一个简单的标准区分隧道和势垒抑制电离多原子分子。

英文摘要:

Ionization rates and Stark shifts of H$_2$, CO, O$_2$, H$_2$O, and CH$_4$ in static electric fields have been computed with coupled-cluster methods in a basis set of atom-centered Gaussian functions with complex-scaled exponent. Consideration of electron correlation is found to be of great importance even for a qualitatively correct description of the dependence of ionization rates and Stark shifts on the strength and orientation of the external field. The analysis of the second moments of the molecular charge distribution suggests a simple criterion for distinguishing tunnel and barrier suppression ionization in polyatomic molecules.

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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