中国物理B ›› 2023, Vol. 32 ›› Issue (11): 113101-113101.doi: 10.1088/1674-1056/acec46

所属专题: SPECIAL TOPIC — Celebrating the 100th Anniversary of Physics Discipline of Northwest University

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Low-lying electronic states of osmium monoxide OsO

Wen Yan(严汶)1,2 and Wenli Zou(邹文利)1,2,†   

  1. 1 Institute of Modern Physics, Northwest University, Xi'an 710127, China;
    2 Shaanxi Key Laboratory for Theoretical Physics Frontiers, Xi'an 710127, China
  • 收稿日期:2023-06-22 修回日期:2023-07-21 接受日期:2023-08-01 出版日期:2023-10-16 发布日期:2023-11-07
  • 通讯作者: Wenli Zou E-mail:zouwl@nwu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 22073072) and the Double FirstClass University Construction Project of Northwest University.

Low-lying electronic states of osmium monoxide OsO

Wen Yan(严汶)1,2 and Wenli Zou(邹文利)1,2,†   

  1. 1 Institute of Modern Physics, Northwest University, Xi'an 710127, China;
    2 Shaanxi Key Laboratory for Theoretical Physics Frontiers, Xi'an 710127, China
  • Received:2023-06-22 Revised:2023-07-21 Accepted:2023-08-01 Online:2023-10-16 Published:2023-11-07
  • Contact: Wenli Zou E-mail:zouwl@nwu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 22073072) and the Double FirstClass University Construction Project of Northwest University.

摘要: The ground state of osmium monoxide (OsO) has long been controversial. In this paper, the low-lying Λ-S and Ω electronic states of OsO have been comprehensively studied by the high-precision multi-reference calculations. The ground state of OsO is unexpectedly the closed-shell 1Σ+ state with a double bond instead of the previously reported 3Φ or 5Σ+ state; after including the spin-orbit coupling effects, the ground state becomes 3Π2. With the help of the theoretical spectroscopic constants and transition dipole moments, the emission spectra in the region of 405 nm-875 nm are assigned. Our results will facilitate the future studies of absorption and emission spectra of OsO.

关键词: transition dipole moment, multi-reference second-order perturbation theory, spin-orbit coupling, exact two-component

Abstract: The ground state of osmium monoxide (OsO) has long been controversial. In this paper, the low-lying Λ-S and Ω electronic states of OsO have been comprehensively studied by the high-precision multi-reference calculations. The ground state of OsO is unexpectedly the closed-shell 1Σ+ state with a double bond instead of the previously reported 3Φ or 5Σ+ state; after including the spin-orbit coupling effects, the ground state becomes 3Π2. With the help of the theoretical spectroscopic constants and transition dipole moments, the emission spectra in the region of 405 nm-875 nm are assigned. Our results will facilitate the future studies of absorption and emission spectra of OsO.

Key words: transition dipole moment, multi-reference second-order perturbation theory, spin-orbit coupling, exact two-component

中图分类号:  (Ab initio calculations)

  • 31.15.A-
31.15.aj (Relativistic corrections, spin-orbit effects, fine structure; hyperfine structure) 31.15.am (Relativistic configuration interaction (CI) and many-body perturbation calculations) 36.20.Kd (Electronic structure and spectra)