Effect of J dependence of Raman cross sections on CARS product quantum state distributions for the H+D2 → HD+D reaction

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Abstract
HD product quantum state distributions are recalculated for published CARS measurements using J‐dependent Raman cross sections determined from accurate, ab initio calculations. The use of J‐dependent cross sections lowers calculated number densities by 5%–10% at high J and therefore systematically shifts the relative product‐state distribution somewhat from high J to low J. This shift does not noticeably affect discrepancies between CARS results and multiphoton ionization experiments on the same reaction. The results indicate that J‐dependent Raman cross sections should be used in reducing vibrational Q‐branch CARS and other Raman data for molecular hydrogen and its isotopes.