Collisional Deactivation of O(1S)

Absolute rate coefficients for the collisional deactivation of O(1S) have been measured for CO2, CO, SF6, O2, H2O, NH3, CH4, C2H4, C2H6N2O, NO, NO2, H2, N2, He, Ne, Ar, Kr, and Xe. The measurements have been made with a lifetime technique in which O(1S) is produced in the photodissociation of CO2 by a pulsed vacuum-ultraviolet light source The rate coefficients were obtained from time-resolved measurements of the intensity of the O(1S → 1D) line at 5577 Å. Deactivation of O(1S) by collision induced radiation has been observed for H2, N2, Ar, Kr, and Xe.