高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (12): 1910.

• 论文 • 上一篇    下一篇

SO分子势能曲线及振动能级的从头算研究

朱华, 谢代前, 鄢国森   

  1. 四川大学化学系, 成都 610064
  • 收稿日期:1998-11-10 出版日期:1999-12-24 发布日期:1999-12-24
  • 通讯作者: 谢代前
  • 作者简介:朱华,女,27岁,博士研究生,助教.
  • 基金资助:

    国家自然科学基金(批准号:29673029);国家教育部博士点专项基金资助课题

Ab Initio Calculations of the Potential Energy Curves and Vibrational Levels of SO

ZHU Hua, XIE Dai-Qian, YAN Guo-Sen   

  1. Department of Chemistry, Sichuan University, Chengdu 610064, China
  • Received:1998-11-10 Online:1999-12-24 Published:1999-12-24

摘要: ab initioMRD-CI方法研究了SO分子的基态X3Σ-及激发态a1Δ,b1Σ+,A3Π,c1Π,d1Σ-的势能曲线.结果表明,前4个电子态的平衡键长与实验结果吻合得很好,振动能级和转动常数的从头算计算结果也与已观测到的数据较吻合.此外,还对同位素取代物34S16O和32S18O的振动能级和转动常数进行了讨论.

关键词: 从头计算, 势能曲线, MRD-CI, 有效势, 基组

Abstract: Ab initio MRD CIcalculations have been carried out for six low lying states of SO. The potential curves for the X3Σ-ground and a1Δ, b1Σ+, A3Π, c1Π, d1Σ-excited states were determined with the use of ECP. The bond lengths of the lowest four states were found to be in good agreement with the experimental results. In addition, vibrational levels and rotational constants have been calculated and were found to compare well with the measured data. The vibrational levels and rotational constants for the isotopomers 34S16O and {32S18O} were also studied and discussed.

Key words: Ab initio, Potential energy curve, MRD-CI, Effective core potential, Basis set

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