Molecular beam photoionization study of H 2S

Abstract

Photoionization efficiency data for H 2S +, S + and HS + have been obtained in the region 645–1190 Å using the molecular beam method. The ionization energy of H 2S was determined to be 10.4607±0.0026 eV (1185.25±0.30 Å). The observed autoionizing vibrational progressions are tentatively assigned to the Rydberg transitions: 5 a 1→ nsa 1 ( n = 5 and 6) and 2 b 2→ nda 1 ( n = 4 and 5).