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Selection rules for electric multipole transition of triatomic molecule in scattering experiments |
| Hong-Chun Tian(田红春)1,2, Long-Quan Xu(徐龙泉)1,2, Lin-Fan Zhu(朱林繁)1,2 |
1. Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;
2. Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China |
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Abstract 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.
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Received: 08 January 2018
Revised: 18 January 2018
Accepted manuscript online:
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PACS:
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31.10.+z
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(Theory of electronic structure, electronic transitions, and chemical binding)
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34.50.-s
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(Scattering of atoms and molecules)
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31.15.xh
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(Group-theoretical methods)
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| Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0402300), the National Natural Science Foundation of China (Grant No. U1732133), and the Science Fund from Chinese Academy of Sciences (Grant No. 11320101003). |
Corresponding Authors:
Lin-Fan Zhu
E-mail: lfzhu@ustc.edu.cn
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Cite this article:
Hong-Chun Tian(田红春), Long-Quan Xu(徐龙泉), Lin-Fan Zhu(朱林繁) Selection rules for electric multipole transition of triatomic molecule in scattering experiments 2018 Chin. Phys. B 27 043101
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