中国物理B ›› 2024, Vol. 33 ›› Issue (5): 53401-053401.doi: 10.1088/1674-1056/ad24d9

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Vibronic effect study of 1A2 state of H2O and D2O

Bei-Yuan Zhang(张倍源)1, Li-Han Wang(王礼涵)1, Jian-Hui Zhu(朱剑辉)1, Wei-Qing Xu(徐卫青)2, Zi-Ru Ma(马子茹)1, Xiao-Li Zhao(赵小利)3, Yong Wu(吴勇)4,5,6,†, and Lin-Fan Zhu(朱林繁)1,‡   

  1. 1 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;
    2 Center for Transformative Science, ShanghaiTech University, Shanghai 201210, China;
    3 Department of Physics, Yantai University, Yantai 264005, China;
    4 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
    5 School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China;
    6 HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100084, China
  • 收稿日期:2024-01-15 修回日期:2024-01-28 接受日期:2024-02-01 出版日期:2024-05-20 发布日期:2024-05-20
  • 通讯作者: Yong Wu, Lin-Fan Zhu E-mail:wu_yong@iapcm.ac.cn;lfzhu@ustc.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12334010, 12174259, and 11604003).

Vibronic effect study of 1A2 state of H2O and D2O

Bei-Yuan Zhang(张倍源)1, Li-Han Wang(王礼涵)1, Jian-Hui Zhu(朱剑辉)1, Wei-Qing Xu(徐卫青)2, Zi-Ru Ma(马子茹)1, Xiao-Li Zhao(赵小利)3, Yong Wu(吴勇)4,5,6,†, and Lin-Fan Zhu(朱林繁)1,‡   

  1. 1 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;
    2 Center for Transformative Science, ShanghaiTech University, Shanghai 201210, China;
    3 Department of Physics, Yantai University, Yantai 264005, China;
    4 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
    5 School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China;
    6 HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100084, China
  • Received:2024-01-15 Revised:2024-01-28 Accepted:2024-02-01 Online:2024-05-20 Published:2024-05-20
  • Contact: Yong Wu, Lin-Fan Zhu E-mail:wu_yong@iapcm.ac.cn;lfzhu@ustc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12334010, 12174259, and 11604003).

摘要: The generalized oscillator strengths of the dipole-forbidden excitations of the ${}^{1}$A$_{2}$ of $\mathrm{H_2O}$ and $\mathrm{D_2O}$ were calculated with the time dependent density functional theory, by taking into account the vibronic effect. It is found that the vibronic effect converts the dipole-forbidden excitation of the ${}^{1}$A$_{2}$ into a dipole-allowed one, which enhances the intensities of the corresponding generalized oscillator strength in the small squared momentum transfer region. The present investigation shows that the vibronic effect of $\mathrm{H_2O}$ is slightly stronger than that of $\mathrm{D_2O}$, which exhibits a clear isotopic effect.

关键词: water, heavy water, generalized oscillator strength, vibronic effect, isotope effect

Abstract: The generalized oscillator strengths of the dipole-forbidden excitations of the ${}^{1}$A$_{2}$ of $\mathrm{H_2O}$ and $\mathrm{D_2O}$ were calculated with the time dependent density functional theory, by taking into account the vibronic effect. It is found that the vibronic effect converts the dipole-forbidden excitation of the ${}^{1}$A$_{2}$ into a dipole-allowed one, which enhances the intensities of the corresponding generalized oscillator strength in the small squared momentum transfer region. The present investigation shows that the vibronic effect of $\mathrm{H_2O}$ is slightly stronger than that of $\mathrm{D_2O}$, which exhibits a clear isotopic effect.

Key words: water, heavy water, generalized oscillator strength, vibronic effect, isotope effect

中图分类号:  (Electronic excitation and ionization of molecules)

  • 34.50.Gb
34.80.Gs (Molecular excitation and ionization) 31.15.ee (Time-dependent density functional theory) 95.30.Ky (Atomic and molecular data, spectra, and spectralparameters (opacities, rotation constants, line identification, oscillator strengths, gf values, transition probabilities, etc.))