in irradiated protoplanetary disks: Linking far-ultraviolet radiation and water vapor

Open Access

Fig. C.1

Cross sections for FUV photoionization of $H_{2}^{*}$ ${\rm{H}}_2^*$ , from vibrationally excited levels v″ to $H_{2}^{+}$ ${\rm{H}}_2^ +$ vibrationally excited levels, v′ , as a function of FUV photon energy (from Ford et al. 1975). Upper panel: $H_{2}^{*} (v^{″} = 4 to 9)$ ${\rm{H}}_2^*\left( {v '' = 4\,{\rm{to}}\,{\rm{9}}} \right)$ . Lower panel: H₂(v″ = 10 to 14). The numbers (in black) on the horizontal sections of the curves denote the v′ levels of $H_{2}^{+}$ ${\rm{H}}_2^ +$ .

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