Efficiencies in the Exchange of Translational and Vibrational Energies in Cyclopropane‐Argon Mixtures

TLDR: In this paper, the velocity dispersions in cyclopropane and argon mixtures are investigated as a means of characterizing the repulsive parameters both for cycloprapane and arginon.

Abstract: The velocity dispersions in cyclopropane‐argon mixtures are investigated as a means of characterizing the repulsive parameters both for cyclopropane and argon. It is found that the removal of energy from a vibrationally excited cyclopropane is more efficiently accomplished by another cyclopropane molecule than by an argon atom. Since there is virtually no mass effect in comparing the probabilities of translation‐vibration energy exchange for cyclopropane‐argon and cyclopropane‐cyclopropane encounters, the difference is attributed to a steeper intermolecular potential in the case of cylcopropane self‐collisions. Quantitative results are obtained by comparing the experimental values with those from the equation of Herzfeld and Litovitz.