Two-photon excitation of the lowest g states in Xe₂

Abstract

Two-photon excitation spectra of xenon were recorded for the energy region of 67000-69000 cm-1 and a pressure range of 50-500 Torr, using frequency-doubled light of a tunable pulsed dye laser. Molecular structures related to the 0g+(3P1), 1g(3P1), and 1g(3P2) states of the 5p56s configuration of Xe I were observed. The assignment was based on the polarisation dependence of the excitation rate. The fluorescence behaviour of the excited states is discussed.