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Article type: Research Article
Authors: Jecko, Th.;
Affiliations: IRMAR, Université de Rennes I, Campus Beaulieu, F‐35042 Rennes cedex, France E‐mail: jecko@maths.univ‐rennes1.fr
Note: [] Previous address: Fachbereich Mathematik MA 7‐2, Technische Universität Berlin, Strasse des 17. Juni 136, D‐10623 Berlin, Germany.
Abstract: [fr] Pour des molécules diatomiques dans la limite de Born–Oppenheimer, on construit une approximation adiabatique de plusieurs sections efficaces totales, y compris des sections inélastiques. On montre la prépondérance de la diffusion élastique et l’on en donne des termes dominants. L’un d’eux contient un potentiel effectif, ce qui permet de réduire la diffusion à celle d’un système à deux corps. De plus, l’approximation améliore une borne a priori sur d’autres sections totales. Abstract. In the Born–Oppenheimer limit, for diatomic molecules, we approximate several total cross‐sections, including inelastic ones, by adiabatic equivalents. We show the preponderance of the elastic total cross‐section and we give leading terms for it. One of them contains a two‐body efficient potential so that the scattering behaviour may be well‐approximated by those of some two‐body system. Furthermore, the adiabatic approximation improves an a priori bound on some other total cross‐sections.
Journal: Asymptotic Analysis, vol. 24, no. 1, pp. 1-35, 2000
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