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

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Urbain, Xavier [UCL] Cornet, Alain [UCL] Brouillard, F. Giustisuzor, A.

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.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 1991
Language Anglais
Journal information "Physical Review Letters" - Vol. 66, no. 13, p. 1685-1688 (1991)
Peer reviewed yes
Publisher American Physical Soc (College Pk)
issn 0031-9007
e-issn 1079-7114
Publication status Publié
Affiliation UCL - SC/PHYS - Département de physique
Links
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Bibliographic reference Urbain, Xavier ; Cornet, Alain ; Brouillard, F. ; Giustisuzor, A.. Dynamics of An Elementary Bond-forming Process - Associative Ionization in H(1s) + H(2s) Collisions. In: Physical Review Letters, Vol. 66, no. 13, p. 1685-1688 (1991)
Permanent URL http://hdl.handle.net/2078.1/51186