The Journal of chemical physics

Predissociation of the acetylene à 1Au state and its mechanism

A Haijima, M Fujii, M Ito

Index: Haijima, Akimitsu; Fujii, Masaaki; Ito, Mitsuo Journal of Chemical Physics, 1990 , vol. 92, # 2 p. 959 - 968

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Citation Number: 53

Abstract

The fluorescence excitation spectrum, the MPI spectrum, and the absorptionspectrum of acetylene were observed for the à 1 A u← X̃ 1∑+ g band system in a static gas cell and in a supersonic jet. A sudden and drastic decrease in fluorescence quantum yield, Φ f, was found between the V 4 K 2 (46 339 cm− 1) and 21 V 3 K 0 (46 673 cm− 1) sublevels. The decrease in Φ f is concluded to be due to the predissociation into C2 H+ H. J dependence ...