Abstract
Atomic sulfur S(3p43P) was generated in the photolysis of OCS at 248 nm and exited to the 3p34p3P state by ultraviolet two-photon absorption at 308 nm. Transfer from the 3p34p3P state to the 3p34s3S state by infrared radiation and/or collisions with ambient gases was followed by the vacuum ultraviolet (VUV) fluorescence via the 3p34s3S → 3p43P transition at 180 nm. The time-resolved VUV fluorescence intensity was recorded at varying pressures of N2. Kinetic analyses have given not only the overall rate coefficient for quenching of the 3p34p3P state by N2 but also the branching ratio of the quenching from the 3p34p3P state to the 3p34s3S state.
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