Abstract
Atomic sulfur in the electronic ground state 3p43P2 was excited to the 3p34p 3P2 state by two-photon excitation at 308 nm and the vacuum ultraviolet (VUV) fluorescence via the 3p34s 3S → 3p43PJ transition at 180 nm was observed. The time-resolved VUV fluorescence was recorded at varying pressures of He. A kinetic analysis by the integrated profiles method gave the rate coefficient for overall quenching of the 3p34p 3PJ state by collisions with He. The He pressure dependence of the VUV fluorescence intensity averaged in time has derived the branching ratio of the state-specific quenching from the 3p34p 3PJ state to the 3p34s 3S state.
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