Dynamics of An Elementary Bond-forming Process - Associative Ionization in H(1s) + H(2s) Collisions

Urbain, Xavier;Cornet, Alain;Brouillard, F.;Giustisuzor, A.
(1991) Physical Review Letters — Vol. 66, n° 13, p. 1685-1688 (1991)

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  • Urbain, Xavierorcid-logoUCLouvain
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  • Cornet, AlainUCLouvain
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  • Brouillard, F.
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  • Giustisuzor, A.
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Abstract
Using a merged-beam apparatus, we have measured the absolute cross section for the associative ionization process H(1s) + H(2s) --> H2+e- between 0.5 and 10 eV. The total cross section rises until a maximum of 2.4 x 10(-17) cm2 at the H2+ dissociation threshold (3.4 eV) and exhibits a minimum around 2 eV. We attribute this feature to interferences between two reaction paths. Calculations combining a quantum-defect treatment of the multichannel ionization with a close-coupling treatment of the atom-atom half collision yield results in good agreement with experiment.
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Urbain, X., Cornet, A., Brouillard, F., & Giustisuzor, A. (1991). Dynamics of An Elementary Bond-forming Process - Associative Ionization in H(1s) + H(2s) Collisions. Physical Review Letters, 66(13), 1685-1688. https://doi.org/10.1103/PhysRevLett.66.1685 (Original work published 1991)