Dynamics of the reaction H2+(He;H)HeH+ total cross sections: comparison of quasiclassical trajectory results with molecular beam data

Using the quasiclassical trajectory method based on the DIM potential energy surface of Kuntz, total reaction and dissociation cross sections for collisions between He atoms and H2+ molecular ions in the hyperthermal energy region 0.5-5.0 eV(c.m.) have been calculated. Detailed comparison of the theoretical results is presented with mass-spectrometric data of Chupka et al. for specific vibrational states of the reactant ion and with the recent data of Schlier et al. for reactant ion vibrational-state mixtures as produced by electron impact ionization; for the latter comparison, appropriately averaged cross sections have been determined. The agreement, except for low translational energies and low vibrational states, is satisfactory. (Auth.)