Calculation of the rotational transition probabilities of diatomic molecules when they collide with heavy particles
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The collisional rotational transition probabilities for molecule-molecule and molecule-atom interactions in three-dimensional space are calculated. The quasiclassical approach developed in  is used. Expressions are obtained that are suitable for practical calculations of single-quantum and double-quantum rotational transitions in diatomic molecules. The collisional rotational transition probabilities are averaged over the Maxwell velocity distribution and their dependence on the gas temperature is obtained. To illustrate the method the results of a calculation of the probabilities for HCl-HCl, HCl-He, CO-CO interaction are presented.
KeywordsMathematical Modeling Mechanical Engineer Velocity Distribution Industrial Mathematic Heavy Particle
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