Abstract
Dissociative electron attachment cross sections (DEA) on vibrationally excited H2 molecule taking place via the 2Σg+ Rydberg-excited resonant state are studied using the local complex potential (LCP) model for resonant collisions. The cross sections are calculated for all initial vibrational levels (vi=0–14) of the neutral molecule. In contrast to the previously noted dramatic increase in the DEA cross sections with increasing vi, when the process proceeds via the X 2Σu+ shape resonance of H2, for the 2Σg+ Rydberg resonance the cross sections increase only gradually up to vi=3 and then decrease. Moreover, the cross sections for vi⩾6 exhibit pronounced oscillatory structures. A discussion of the origin of the observed behavior of calculated cross sections is given. The DEA rate coefficients for all vi levels are also calculated in the 0.5–1000eV temperature range.
Published Version
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