Dissociative Excitation of CH3NO2 by Collisions with HE(2(3)S) and Ne(P-3(0.2))

Dissociative excitation of CH3NO2 by collision with He(2(3)S) and Ne(P-3(0.2)) has been studied respectively by observing CH(A(2) Delta -> X-2 Pi, B-2 Sigma -> X-2 Pi) and C-2 Sigma -> X-2 Pi and H (Balmer) (only in the He(2(3)S)/CH3NO2 reaction) emissions in the beam apparatus under single collision. The emission rate constants of A - X, B X and C - X of CH and H produced from the He(2(3)S)/CH3NO2 reaction were determined by using the reference reaction method. The nascent vibrational distributions and rotational temperatures of CH(A) were determined through computer simulation assumming a Boltzmann rotational distribution. The dissociative process and the formation mechanism of CH(A) were studied, and a two-body dissociative process through an intermediate CH3* for CH(A) was suggested.