Calculations of V–V Transfer Probabilities in CO–CO Collisions

Abstract

This paper presents detailed calculations of vibration—vibration transfer probabilities in $\mathrm{CO}–\mathrm{CO}$ collisions including both long‐range and short‐range interactions. Comparison is made with experimental data, and the results show that the relative contributions of the long‐ and short‐range interactions to the $\mathrm{V}–\mathrm{V}$ transfer probability depend on energy defect and temperature. Our calculations match the experimental data at 300°K to within 25%; at this temperature the the short‐range interactions dominate in determining the transition probability for vibrational energy defects greater than 210 cm⁻¹, while the long‐range interactions dominate for smaller defects.