Reaction of two-photon-excited xenon and krypton atoms with hydrogen molecules

Abstract

Xenon and krypton atoms were prepared in excited g states, 6p[1/2] 0 and 5p[1/2] 0 , respectively, by two-photon absorption at the focus of a dye laser beam. In the presence of H 2 molecules, H atoms are formed with kinetic energy about that required for the reaction Xe * +H 2 →Xe+2H. The rate constant for quenching of the Xe fluoracence by H 2 is (1.0±0.1)×10 -9 cm 3 molecule -1 s -1 .