Table of Contents
Laser Chemistry
Volume 10, Issue 3, Pages 147-158

Modeling the Vibrational Relaxation of Polyatomic Molecules. The Methylfluoride Case Study

1Dipartimento di Scienze Fisiche, Universita‘ di Napoli, Napoli 80125, Italy
2On leave from the Institute of Isotopic and Molecular Technology, Cluj-Napoca, Romania

Accepted 15 May 1989

Copyright © 1990 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We present in this paper a theoretical analysis of the vibrational translational (V-T) relaxation process in CH3F, carried out by using a numerical model based on rate equations. In particular, we have analysed the dependence of the V-T relaxation time on the average vibrational energy absorbed per molecule. We have also investigated the influence of the dependence of the rate constants used in the model, on the gas translational temperature. The results of the model clearly outline the strongly nonlinear character of the V-T relaxation process in CH3F, a situation commonly observed in other important polyatomic molecules of intermediate size each as SF6, freons, and related methylhalides.