Relaxation of CO2(101), CO2(021), and N2O(101) vibrational levels by near-resonant <i>V</i>→<i>V</i> energy transfer

Abstract

Laser-excited vibrational fluorescence experiments on CO2 and N2O combination levels were performed using a tunable optical parametric oscillator. Rate constants near gas kinetic were obtained and assigned to the near-resonant V→V transfer of an asymmetric stretching quantum. Stimulated emission occurring at 4.3 μ was observed during 2.7 μ excitation of CO2 to the (1001) combination level.