Investigation into the vibrational yield of OH products in the OH+H+H channel arising from the dissociative recombination of H3O +

Abstract

The vibrational population of the hydroxyl radical, OH, formed in the OH+H+H channel arising from the dissociative recombination of the hydronium ion, H3O+, has been investigated at the storage ring CRYRING using a position-sensitive imaging detector. Analysis shows that the OH fragments are predominantly produced in the v=0 and v=1 states with almost equal probabilities. This observation is in disagreement with earlier FALP experiments, which reported OH (v=0) as the dominant product. Possible explanations for this difference are discussed. © 2009 American Institute of Physics.