Fig. 3.

Temperature dependencies of the rate coefficients, nk1 and ek1, measured for reaction (1) with nH2 and with eH2. We also plot data obtained in our previous experiments with nH2 using the same experimental arrangement (Mulin et al. 2015), FDT data of Viggiano & Morris (1994), and SIFT data of Grabowski et al. (1983). The solid and dotted lines show the result of a state-specific model and an Arrhenius model, respectively. For details, see the text. The dash-dotted line indicates the thermal rate coefficient, i.e., the ortho/para ratio is also equilibrated to T.
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