Branching Ratio for O + H<sub>3</sub> <sup>+</sup> Forming OH<sup>+</sup> + H<sub>2</sub> and H<sub>2</sub>O<sup>+</sup> + H
نویسندگان
چکیده
The gas-phase reaction of $\mathrm{O}+\mathrm{H}_3^+$ has two exothermic product channels, $\mathrm{OH}^+ +\mathrm{H}_2$ and $\mathrm{H}_2\mathrm{O}^+ +\mathrm{H}$. In the present study, we analyze experimental data from a merged-beams measurement to derive thermal rate coefficients resolved by channel for temperature range 10 1000 K. Published astrochemical models either ignore second or apply temperature-independent branching ratio 70% vs. 30% formation +\mathrm{H}$, respectively, which originates single point measured at 295 Our results are consistent with this point, but show that varies reaching 58% 42% We provide recommended channels cases, one where initial fine-structure population O$(^3P_J)$ reactant is in its $J=2$ ground state other it equilibrium.
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2022
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/1538-4357/ac41ce