Dissociative electron attachment to vibrationally and rotationally excitedH-2 and HF molecules - art. no. 052705

The vibrational and rotational state dependence of dissociative attachment (DA) in low-energy e-H-2 and e-HF collisions is studied within the framewor k of nonlocal resonance theory. The dynamics of nuclear motion in the nonlo cal complex potential is treated by the quasiclassical approach. The resona nce energy, width function, and level-shift function are taken from our pre vious calculations based on the projection operator formalism. Results for all vibrational states up to the dissociative attachment thresholds and sel ected rotational states are presented. Our cross sections for H-2 exhibit a plateau structure in the energy range above the dissociation threshold, an d this structure gets more pronounced with higher v or J. The dissociative attachment cross section for vibrationally and rotationally hot HF (T = 115 0 K) agrees well with available experimental data. For H-2 in thermal equil ibrium at 1400 K, the agreement between experiment and theory is less satis factory.