COLLISIONAL REMOVAL OF NO (B(2)PI, V=2 AND 3) AT 230 K

Removal rate coefficients for NO(B (II)-I-2) in the v = 2 and 3 levels are measured at 230 K for seven colliders: NO, N2O, CO2, O-2, N-2, Ar , and He. These measurements are the first below room temperature and are compared to earlier 295 K measurements. These NO(B (II)-I-2) vibra tional levels differ from each other ii that the v = 2 level is unpert urbed, and the v = 3 level is significantly perturbed by the v = 12 le vel of the a (II)-I-4 state, Although there are large variations in re moval rate coefficients between the two B (II)-I-2 vibrational levels, the effect of reducing the temperature on the removal rate coefficien ts is modest, the largest effects occurring with the least effective c olliders, He and Ar. (C) 1997 American Institute of Physics.