Analysis of the Intensity Distribution in the near Ultraviolet Absorption Spectrum of Benzene

Abstract

Intensities of the fine structure in the electronic transition A_1g–B_2u, allowed through molecular vibrations in the ground or excited state, are analyzed within the first order approximation in the electron-vibration interaction, processes of the simultaneous emission or absorption of one quantum or several quanta of the vibration being considered. In the analysis three parameters are chosen; one is the ratio of the two electron-vibration coupling constants and the others are parameters associated with the structure of benzene in the excited state. The result is in good agreement with the experiment.