中国物理B ›› 2024, Vol. 33 ›› Issue (5): 53102-053102.doi: 10.1088/1674-1056/ad20de

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Theoretical investigation of excited dipole bound states of alkali-containing diatomic anions

Yi Lian(连艺), Lidan Xiao(肖利丹), Lili Bian(边丽丽), Hai-Feng Xu(徐海峰)†, and Bing Yan(闫冰)‡   

  1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
  • 收稿日期:2024-01-02 修回日期:2024-01-09 接受日期:2024-01-22 出版日期:2024-05-20 发布日期:2024-05-20
  • 通讯作者: Hai-Feng Xu, Bing Yan E-mail:xuhf@jlu.edu.cn;yanbing@jlu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12274178 and 12174148). Support of High Performance Computing Center of Jilin University and the high-performance computing cluster Tiger@ IAMP is acknowledged.

Theoretical investigation of excited dipole bound states of alkali-containing diatomic anions

Yi Lian(连艺), Lidan Xiao(肖利丹), Lili Bian(边丽丽), Hai-Feng Xu(徐海峰)†, and Bing Yan(闫冰)‡   

  1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
  • Received:2024-01-02 Revised:2024-01-09 Accepted:2024-01-22 Online:2024-05-20 Published:2024-05-20
  • Contact: Hai-Feng Xu, Bing Yan E-mail:xuhf@jlu.edu.cn;yanbing@jlu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12274178 and 12174148). Support of High Performance Computing Center of Jilin University and the high-performance computing cluster Tiger@ IAMP is acknowledged.

摘要: Information about electronic excited states of molecular anions plays an important role in investigating electron attachment and detachment processes. Here we present a high-level theoretical study of the electronic structures of 12 alkali-metal-containing diatomic anions $MX^{-}$ ($MX = {\rm LiH}$, LiF, LiCl, NaF, NaCl, NaBr, RbCl, KCl, KBr, RbI, KI and CsI). The equation-of-motion electron-attachment coupled-cluster singles and doubles (EOM-EA-CCSD) method is used to calculate the electron binding energies (EBEs) of 10 electronic excited states of each of the 12 molecule anions. With addition of different s-/p-/d-type diffusion functions in the basis set, we have identified possible excited dipole bound states (DBSs) of each anion. With the investigation of EBEs on the 12 $MX$s with dipole moment (DM) up to 12.1 D, we evaluate the dependence of the number of anionic excited DBSs on molecular DM. The results indicate that there are at least two or three DBSs of anions with a molecular DM larger than 7 D and a molecule with $\rm DM > 10$ D can sustain a $\pi $-DBS of the anion. Our study has some implications for the excited DBS electronic states of alkali-metal-containing diatomic molecules.

关键词: anions, dipole bound states, alkali-metal-containing diatomic molecules

Abstract: Information about electronic excited states of molecular anions plays an important role in investigating electron attachment and detachment processes. Here we present a high-level theoretical study of the electronic structures of 12 alkali-metal-containing diatomic anions $MX^{-}$ ($MX = {\rm LiH}$, LiF, LiCl, NaF, NaCl, NaBr, RbCl, KCl, KBr, RbI, KI and CsI). The equation-of-motion electron-attachment coupled-cluster singles and doubles (EOM-EA-CCSD) method is used to calculate the electron binding energies (EBEs) of 10 electronic excited states of each of the 12 molecule anions. With addition of different s-/p-/d-type diffusion functions in the basis set, we have identified possible excited dipole bound states (DBSs) of each anion. With the investigation of EBEs on the 12 $MX$s with dipole moment (DM) up to 12.1 D, we evaluate the dependence of the number of anionic excited DBSs on molecular DM. The results indicate that there are at least two or three DBSs of anions with a molecular DM larger than 7 D and a molecule with $\rm DM > 10$ D can sustain a $\pi $-DBS of the anion. Our study has some implications for the excited DBS electronic states of alkali-metal-containing diatomic molecules.

Key words: anions, dipole bound states, alkali-metal-containing diatomic molecules

中图分类号:  (Electron correlation calculations for diatomic molecules)

  • 31.15.vn
33.15.-e (Properties of molecules) 33.15.Ry (Ionization potentials, electron affinities, molecular core binding energy)