Abstract
Gaseous CS2 was dissociated at 193 nm into CS and S. The translational and internal energy distributions of the CS fragments were measured. There is now overwhelming evidence that the upper electronic state S3 is predissociative. In fact there are three upper states of importance, the initially excited S3, a state which dissociates to CS(X 1Σ) and S(1D) and a triplet state which dissociates to CS(X 1Σ) and S(3P). The CS fragments were rotationally excited with an average rotational energy ∼3.5 kcal/mole. The vibrational populations were also strongly inverted for both the 1D and the 3P dissociations and their surprisal plots were linear. CS fragments were found with v?7. Of the dissociations resulting in CS fragments with v?6, 80±10% of the S atoms are produced in the 1D state and 20±10% in the 3P state.
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