中国物理B ›› 2009, Vol. 18 ›› Issue (1): 130-135.doi: 10.1088/1674-1056/18/1/020

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Dynamical potential approach to dissociation of H--C bond in HCO highly excited vibration

房超, 吴国祯   

  1. Molecular and Nano Sciences Laboratory, Department of Physics, Tsinghua University, Beijing 100084, China
  • 收稿日期:2008-07-17 修回日期:2008-09-10 出版日期:2009-01-20 发布日期:2009-01-20
  • 基金资助:
    Project supported by the Research Foundation from Ministry of Education of China (Grant No 306020), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No 20060003050), and the National Natural Science Foundation of Ch

Dynamical potential approach to dissociation of H--C bond in HCO highly excited vibration

Fang Chao(房超) and Wu Guo-Zhen(吴国祯)†   

  1. Molecular and Nano Sciences Laboratory, Department of Physics, Tsinghua University, Beijing 100084, China
  • Received:2008-07-17 Revised:2008-09-10 Online:2009-01-20 Published:2009-01-20
  • Supported by:
    Project supported by the Research Foundation from Ministry of Education of China (Grant No 306020), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No 20060003050), and the National Natural Science Foundation of Ch

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摘要： The highly excited vibrational levels of HCO in the electronic ground state, \tilde {X}1A'，are employed to determine the coefficients of an algebraic Hamiltonian， by which the dynamical potential is derived and shown to be very useful for interpreting the intramolecular vibrational relaxation (IVR) which operates via the HCO bending motion. The IVR inhibits the dissociation of H atom and enhances the stochastic degree of dynamical character. This approach is from a global viewpoint on a series of levels classified by the polyad number which is a constant of motion in a certain dynamical domain. In this way, the seemingly complicated level structure shows very regular picture, dynamically.

关键词: HCO dissociation, dynamical potential, stochastic dynamics

Abstract: The highly excited vibrational levels of HCO in the electronic ground state, $\tilde{X}^1A'$，are employed to determine the coefficients of an algebraic Hamiltonian， by which the dynamical potential is derived and shown to be very useful for interpreting the intramolecular vibrational relaxation (IVR) which operates via the HCO bending motion. The IVR inhibits the dissociation of H atom and enhances the stochastic degree of dynamical character. This approach is from a global viewpoint on a series of levels classified by the polyad number which is a constant of motion in a certain dynamical domain. In this way, the seemingly complicated level structure shows very regular picture, dynamically.

Key words: HCO dissociation, dynamical potential, stochastic dynamics

中图分类号:  (Bond strengths, dissociation energies)

  • 33.15.Fm
33.15.Mt (Rotation, vibration, and vibration-rotation constants) 33.20.Tp (Vibrational analysis)