Spectroscopic properties and analytical potential energy function of ground and low-lying excited states of BeC moleule
Authors:
- Ji-Cai ZhangJi-Cai Zhang
- Jin-Feng SunJin-Feng Sun
- De-Heng ShiDe-Heng Shi
- Zun-Lue ZhuZZZun-Lue Zhu
Open Access
- 1 January 2019
- journal article
- research article
- Published by Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences in Acta Physica Sinica
- Vol. 68 (5) , 053102-053102-8
Abstract
BeC是一个具有丰富低激发电子态的分子, 本文基于动态权重完全活性空间自冾场方法获得的参考波函数, 采用多参考组态相互作用方法对BeC分子进行高精度的从头计算, 获得了BeC分子\begin{document}$ {{\rm{X}}^3} {{\text{Σ}} ^ - } $\end{document} ![]()
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, \begin{document}${\rm{A}}^3 {\text{Π}}$\end{document} ![]()
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, \begin{document}$ {{\rm{b}}^1} {{\text{Δ}} } $\end{document} ![]()
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, \begin{document}${{\rm{c}}^1} {\text{Π}}$\end{document} ![]()
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和\begin{document}$ {{\rm{d}}^1}{{\text{Σ}} ^ + } $\end{document} ![]()
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共5个电子态的势能曲线. 为了获得精确的光谱结果, 在计算中考虑了标量相对论效应修正, 并把相互作用能外推至完全基组极限. 在此基础上获得了这些态的光谱常数和偶极距, 以及一些允许跃迁的跃迁偶极距、弗兰克-康登因子和辐射寿命. 最后, 通过扩展的Rydberg函数拟合获得了基态势能曲线精确的解析表达式.
Keywords
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