Crossed beam studies of low energy proton transfer reactions: H2+(Ar,H) HAr+from 0.4 to 7.8 eV (c.m.)

摘要

We present a crossed beam study of the proton transfer reaction H2+(Ar,H) HAr+over an extended energy range. At the lowest collision energies (sim;0.4 eV), the reaction appears to proceed with substantial interaction among all three atoms, while the dynamics become rsquo;rsquo;directrsquo;rsquo; in the higher energy regime. Collision induced dissociation of the HAr+product is observed for collision energies above sim;2 eV, but products with internal energy in excess of the HAr+dissociation limit are observed in all cases. These observations are rationalized in terms of the metastability of HAr+products with rotational energy in excess of the dissociation limit. A surprisal analysis on the product translational energy distributions is also presented.