Vibrational Relaxation of Highly Excited Diatomics. IV. HF(v=1-7) + CO2, N2O, and Hf

摘要

Vibrational relaxation rate constants are measured for HF(v = 1-4) with Q = CO2, N2O, and HF by the fast flow infrared chemiluminescence technique using four HF(v) generating reactions whose initial vibrational distributions are found to be unrelaxed. The data are combined with earlier results for v = 5, 6, and 7 to provide information on v dependence and quenching mechanism. The rate constants k superscript Q sub V, V-1 range from 1.2 x 10 to the -12 power to 4.5 x 10 to the -10 power cc/s and increase with power law exponents n of 2.7 to 3.0 in directly proportional to V superscript n for all three quenchers. The relaxation is principally V-V for CO2 and N2O, but mainly V-R,T for HF, at least for hte higher v levels. The relaxation rate constants are compared with theoretical estimates and from a valuable data base for future theoretical work.