Vibrational and Vibronic Structure in the Valence Electron Spectrum of H₂S

The high resolution HeI induced electron spectrum of H 2 S is presented and the energies of the observed vibrational and vibronic bands are reported. In the 2 B 1 electron band two progressions of vibrational bands have been measured. In the 2 A 1 electron band the vibronic structure associated with v 2 bending vibrations has been partially resolved. Assignments of the vibronic bands are suggested from a comparison with electronic emission data in terms of the vibrational and angular momentum quantum numbers v 2 and K .