Analysis of vibrational structure and Jahn-Teller effects in the electron spectrum of ammonia

Abstract

The electron spectra of the A12←1A1 and the E←12A1 transitions of ammonia have been measured with sufficient resolution to observe considerable fine structure. The first transition, A12←1A1, contains two vibrational progressions which are assigned to the ν2 bending mode. The second transition E←12A1, consists of two overlapping electron bands due to Jahn-Teller splitting of the 2E state. The vibronic structure accompanying this transition has been partially resolved and compared to the results of model calculations.