Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Theoretical Investigation of the Vibrational Relaxation of NO(${\upsilon}=1-7$) in Collisions with $O_{2}\;and\;N_{2}$

  • Jongbaik Ree (Department of Chemistry, College of Education, Chonnam National University)
  • Published : 1993.02.20
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Abstract

The vibrational relaxation rate constants of NO(v = 1-7) by $O_2\;and\;N_2$ have been calculated in the temperature range of 300-1000 K using the solution of the time-dependent Schrodinger equation. The calculated relaxation rate constants by $O_2$ increase monotonically with the vibrational energy level v, which is compatible with the experimental data, while those by $N_2$ are nearly independent of v in the range of $3.40 {\pm}1.60{\times}10_{-16} cm^3$/molecule-sec at 300 K. Those for NO(v) + $N_2$ are about 2-3 orders of magnitude smaller than those for NO(v) + $O_2$, because the latter is an exothermic processes while the former an endothermic. Relaxation processes can be interpreted by single-quantum V-V transition. The contributions of V-T/R transition and double-quantum V-V transition to the relaxation are negligible over the entire temperature range.

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