Energy transfer in collisions of Ar(3P0,2 metastable atoms with H(2S) atoms. I. Total rate constant and mechanism |
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| Authors: | Michael A.A. Clyne Penelope B. Monkhouse D.W. Setser |
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| Affiliation: | Department of Chemistry, Queen Mary College, Mile End Road, London E1 4NS, UK;Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, USA |
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| Abstract: | The Ar(4s,3P2) + H(1S,2S) reaction, which gives excited H(n=2) atoms, has been studied. The room temperature rate constant for Lyman-α (2p-1s) excitation was measured as 2.4 × 10?10 cm3 mol?1 s?1. The method was based upon comparison of the Lyman-α emission intensity with the Kr resonance emission intensity produced from Ar(3P2) + Kr, which has a known rate constant. The H atom excitation, which has a large energy defect of 1.3 eV, is discussed in terms of a curve crossing mechanism. |
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