We report a new advance in the study of muonium (Mu) reactivity; specifically, we report the rate constant for the Mu + H 2 (vibrational quantum number n = 1) reaction determined by measurements at 300 K and by converged quantum mechanical calculations. Comparisons are made with earlier results for D + H 2 ( n = 1) and with the corresponding thermal reaction rates. The measurements are a sensitive probe of the high-curvature region in the entrance valley of the potential energy surface (PES) and thus provide a qualitatively different probe of the PES than that provided by any previous experiment.
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Bakule et al. (2012) studied this question.
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