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Ion pair production in H(1S)+H(2S) collisions

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Fussen, D. Claeys, W. Cornet, Alain [UCL] Jureta, Jozo [UCL] Defrance, Pierre [UCL]

The total cross section of the charge transfer reaction H/sub A /(2s)+H/sub B/(1s) rarr H/sub A//sup -/+H/sub B //sup +/ has been experimentally investigated by Claeys et al. (1977) in the energy range 80 to 400 eV. No evidence of ion pair production was found and only an upper limit of the cross section was assigned sigma <2.8 10/sup -17/ cm/sup 2/. This result was surprising as it was in apparent disagreement with the detailed balancing for the neutralisation reaction: H/sub A//sup +/+H /sub B//sup -/ rarr H(2s)+H(1s). The question is now better understood in view of recent theoretical approaches (Sidis et al., 1981; Borondo et al, 1981). Reaction (1) is in fact a `two-electron process' (core exchange of the 1s orbital followed by the excitation of the 2s electron to the diffuse orbital of H/sup -/) while reaction (2) is a direct charge transfer.

Document type Communication à un colloque (Conference Paper) – Présentation orale avec comité de sélection
Publication date 1983
Language Anglais
Conference "Electronic and Atomic Collisions. 13th International Conference on the Physics of Electronic and Atomic Collisions (papers in summary form only received)", Berlin, West Germany (27 July-2 August 1983)
Peer reviewed yes
Host document Eichler, J.; Fritsch, W.; Hertel, I.V.; Stolterfoht, N.; Wille, U.; ; "Electronic and Atomic Collisions. 13th International Conference on thePhysics of Electronic and Atomic Collisions (papers in summary formonly received)"- p. 334
Publisher Int. conference on the phys. electron. & atomic collisions
Affiliation UCL
Links
Bibliographic reference Fussen, D. ; Claeys, W. ; Cornet, Alain ; Jureta, Jozo ; Defrance, Pierre. Ion pair production in H(1S)+H(2S) collisions.Electronic and Atomic Collisions. 13th International Conference on the Physics of Electronic and Atomic Collisions (papers in summary form only received) (Berlin, West Germany, 27 July-2 August 1983). In: Eichler, J.; Fritsch, W.; Hertel, I.V.; Stolterfoht, N.; Wille, U.;, Electronic and Atomic Collisions. 13th International Conference on thePhysics of Electronic and Atomic Collisions (papers in summary formonly received), Int. conference on the phys. electron. & atomic collisions1983, p. 334
Permanent URL http://hdl.handle.net/2078.1/68408