中国物理B ›› 2018, Vol. 27 ›› Issue (4): 43101-043101.doi: 10.1088/1674-1056/27/4/043101
• ATOMIC AND MOLECULAR PHYSICS • 上一篇 下一篇
Hong-Chun Tian(田红春), Long-Quan Xu(徐龙泉), Lin-Fan Zhu(朱林繁)
Hong-Chun Tian(田红春)1,2, Long-Quan Xu(徐龙泉)1,2, Lin-Fan Zhu(朱林繁)1,2
摘要: In the electron or x-ray scattering experiment, the measured spectra at larger momentum transfer are dominated by the electric dipole-forbidden transitions, while the corresponding selection rules for triatomic molecules have not been clearly elucidated. In this work, based on the molecular point group, the selection rules for the electric multipolarities of the electronic transitions of triatomic molecules are derived and summarized into several tables with the variation of molecular geometry in the transition process being considered. Based on the summarized selection rules, the electron energy loss spectra of H2O, CO2, and N2O are identified, and the momentum transfer dependence behaviors of their valence-shell excitations are explained.
中图分类号: (Theory of electronic structure, electronic transitions, and chemical binding)