Abstract
The first direct kinetic observation on electronically excited Se(4 1D 2) atoms, following the flash photolysis of OCSe, are reported. The kinetics of Se(4 1D 2) were monitored using time-resolved atomic absorption spectrophotometry. (λ = 185.8 nm). Quenching data for the noble gases He, Ne, Ar, Kr and Xe are reported and the data discussed in terms of singlet-triplet curve crossings which are now well established for the noble gas oxides. High efficiencies for electronic to translational energy transfer are observed despite the large electronic energy involved.
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