Dynamics of the reaction H+2(He,H)HeH+. Endoergic channels with H+2 in ν = 0,1 vibrational states: beam experiment and trajectory calculations

✍ Scribed by V. Pacák; U. Havemann; Z. Herman; F. Schneider; L. Zülicke

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 368 KB
• Volume: 49
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(77)80585-x

✦ Synopsis

A vibrationally selected beam of Hf2 was used to investigate experimentally the reaction dynamics of the lowest two (cndoergic) channels of the process Hs(u = 0.1) + He = HeH++ H at the relative co!lision energy 3.58 eV, and to provide data for comparison with quasi-classical trajector# calculations. The process proceeds via a direct mechanism_ In comparison with the reaction dynamics observed for the non-selected beam, where various vibrationally excited reactant ions participated, the results showin a good agreement between theory and experiment -a prominent decrease of the forward "stripping" scattering, and apparently an increased peak value of the recoil translational ener_ry. This is consistent with the simple idea that small impact-parameter collisions leading to large-angle scattering arc required to achieve an effective translational energy transfer necessary to overcome the reaction barrier.