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Ionisation (E,2E) à haute énergie d'incidence de systèmes diatomiques mono- et biélectriques en régime asymétrique coplanaire : application de différentes déscriptions du continuum électronique à deux centres

Abstract : Being the most abundant element of universe, hydrogen plays an important rôle in various fields of contemporary physics and chemistry. Therefore, it seems judicious to study natural hydrogen, under its diatomic molecular shape, as well for its fondamental theoretical nature as for the numerous applications it can generate in the sector of industry. In our study, we have chosen the point of view of collisions physics and we have focused our effort on the process of single ionization of diatomic targets by fast electronic impact. In the first part of our study, we have evaluated the contribution of molecular vibrations to differential cross sections for ionization. As an example, we have calculated the triple differential cross section for molecular targets of hydrogen, deuterium and tritium for various energy resolutions. In the second part, we have established a simplified analytical expression of the wavefunction describing the electronic continuum of a two coulombic centers system, in order to describe the ejected electron during the ionization process. At last, after having constructed various theoretical models based on the description of the ejected electron, we have evaluated multiple differential cross section for this models. In particular, we have compared our theoretical results to experimental data obtained for the triple differential cross section
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https://hal.univ-lorraine.fr/tel-01775450
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  • HAL Id : tel-01775450, version 1

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Philippe F. R. Weck. Ionisation (E,2E) à haute énergie d'incidence de systèmes diatomiques mono- et biélectriques en régime asymétrique coplanaire : application de différentes déscriptions du continuum électronique à deux centres. Physique [physics]. Université Paul Verlaine - Metz, 2001. Français. ⟨NNT : 2001METZ002S⟩. ⟨tel-01775450⟩

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