Inelastic squared form factors of the vibronic states of B1Σu+, C1Πu, and EF1Σg+ for molecular hydrogen deuteride studied by fast electron scattering

Long-Quan Xu, Yi-Geng Peng, Tao Xiong, Xin Xu, Ya-Wei Liu, Yong Wu, Jian-Guo Wang, and Lin-Fan Zhu
Phys. Rev. A 98, 012502 – Published 5 July 2018

Abstract

A joint experimental and theoretical investigation of the valence-shell excitations of hydrogen deuteride has been performed by the fast electron impact method at an incident electron energy of 1500 eV and the multireference single- and double-excitation configuration-interaction method. Momentum-transfer-dependent inelastic squared form factors for the vibronic states belonging to the B1Σu+, C1Πu, and EF1Σg+ of molecular hydrogen deuteride have been derived with a high-energy resolution of 70 meV. Similar to the results of molecular hydrogen [L. Q. Xu, K. Xu, Y. G. Peng, X. Xu, Y. W. Liu, Y. Wu, K. Yang, N. Hiraoka, K. D. Tsuei, J. G. Wang, and L. F. Zhu, Phys. Rev. A 97, 032503 (2018)], the present calculations do not satisfactorily reproduce the profiles of the inelastic squared form factors for the higher vibronic states of the B1Σu+ of hydrogen deuteride. However, the discrepancies between the experimental and calculated results of the B1Σu+ of hydrogen deuteride show a weaker dependence on the vibronic number than those of molecular hydrogen, i.e., the present experimental results for the B1Σu+ of hydrogen deuteride are in better agreement with the calculated ones than those of the molecular hydrogen. It is very likely that the electronic-vibrational coupling effect in hydrogen deuteride is less important than that in molecular hydrogen. For the C1Πu state and some vibronic excitations of the EF1Σg+ state, the present experimental results are lower than the present calculations, which may be due to the fact that the first Born approximation does not hold at an incident electron energy of 1500 eV.

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  • Received 13 May 2018

DOI:https://doi.org/10.1103/PhysRevA.98.012502

©2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Long-Quan Xu1,2, Yi-Geng Peng3, Tao Xiong1,2, Xin Xu1,2, Ya-Wei Liu1,2, Yong Wu3,4,*, Jian-Guo Wang3, and Lin-Fan Zhu1,2,†

  • 1Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
  • 2Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
  • 3Institute of Applied Physics and Computational Mathematics, Beijing 100088, People's Republic of China
  • 4HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100084, People's Republic of China

  • *wuyong@iapcm.ac.cn
  • lfzhu@ustc.edu.cn

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Issue

Vol. 98, Iss. 1 — July 2018

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