Abstract
Vibrational transition processes of H 2 molecule in the electronic ground state by H atom impact are investigated theoretically by solving vibrational close coupling equations under the rotational IOS approximation. Integrated cross sections for non-reactive vibrational transitions from the initial vibrational states within 0≤ v ≤4 to all the energetically accessible final vibrational states are calculated at the impact energy below the dissociation energy of H 2 molecule. The cross sections for vibrational multiple quantum transitions have the same order of magnitude as the cross section for a single quantum transition. It is confirmed that the multi-quantum vibrational transitions proceed step by step through the vibrational matrix elements V v , v ±1 of interaction potential. It is found that a dip part of the vibrational matrix elements induces vibrational transitions and a positive part makes little effect to these transitions.
Published Version
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