Quenching of infrared chemiluminescence. Part 5.—Rates of energy transfer from CO (4 ⩽v⩽ 18) to polyatomic molecules
Abstract
A study has been made of the quenching of the infrared chemiluminescence from vibrationally excited CO, formed in the reactions, O(3P)+ CS → CO + S and O(3P)+ CSe → CO + Se, by Q = SO2, C2N2, CH4, CF4 and SF6. Collisional probabilities, Pv,v–1, for CO(v)+ Q → CO(v–1)+ Q have been determined for 4 ⩽v⩽ 18. The mechanisms of these relaxation processes are discussed in the light of the variation of Pv,v–1/v, since, in several cases, this provides a strong indication of the role played by near-resonant vibrational–vibrational energy exchange.