Abstract: | A model based on binary-like collisions is presented to describe the vibrational relaxation of diatomic molecules in a monatomic medium. For N2Ar and COAr, it is shown that the oscillatory motion of host atoms undergoing multiquantrum processes is most important in removing vibrational energy. The translational motion of molecules confined to the cell space also contributes to the energy relaxation by removing the energy mismatch. |