VIBRATIONAL-STATE DISTRIBUTION OF N2(B3Πg) PRODUCED FROM THE Ar(3P2,0)+N2O REACTION

Article abstract of DOI:10.1021/j100320a051

The N2(B³Π_g) product-state distribution for ν'=0-12 has been analyzed from the fluorescence observed in an Ar(³P_2,0)+N2O afterglow.This vibronic distribution shows a non-Boltzmann property, inverted at ν'=4.N2(B) was found to be formed via predissociation of the Rydberg state converging into the ground state of N2O⁺.The golden-rule model and the half-collision model in the collinear configuration are applied to this reaction system to explain the dynamical features.The results show that both Franck-Condon-like effects and final-state interactions are important in the predissociative excitation of N2O.Potential curves are proposed for the effective harmonic oscillator and the repulsive states to reproduce the experimental vibronic-state distribution of N2(B) and to interpret the predissociation mechanism.