Etude théorique des effets de corrélation électronique dans l'ionisation dissociative de H2 et l'ionisation double de Li par impact d'électron rapides

Abstract : Recent progress made in the coincidence detection of emerging particules from an inelastic collision has risen new interest for fundamental studies in the field of dissociative ionization of diatomic molecules by electron impact. The detection in coincidence of the ejected and the scattered electrons give information about the electronic structure and the mechanisms of the simultaneous processes of ionization and dissociation. Moreover, the detection of one of the two emerging protons enables us to obtain the variation of the multiplement differential cross section for a given orientation of the internuclear axis ofthe target. The study of the double excitation of an atomic or molecular system is one of the basic problems of atomic physics, where the electronelectron correlation can be experimentally observed Our aim is to study theoretically two particular processes of this type. 1)- The dissociative ionization of H2 and Li2 as a vertical transition from the fundamental electronic) l state of H2 and Li2 to the first dissociative 'Ij ttut. of H2* and Li2*. 2)- The double Ionization of the K-shell of atomic lithium by using the correlated wave functions for the description of the double electronic continuum.
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Noureddine Lahmidi. Etude théorique des effets de corrélation électronique dans l'ionisation dissociative de H2 et l'ionisation double de Li par impact d'électron rapides. Autre [cond-mat.other]. Université Paul Verlaine - Metz, 2006. Français. ⟨NNT : 2006METZ016S⟩. ⟨tel-01752466⟩

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