Ionisation (e, 2e) du lithium atomique, influence des électrons du coeur dans la détermination, par ondes distordues, de la section efficace triplement différentielle

Abstract : We present in this work the study of the (e,2e) ionization of atomic and diatomic lithium by electronic impact. In the first section we study the ionization of the atomic lithium, by considering for the first time, the various terms of exchange in the calculation of the transition matrix element. Our study shows that the term of exchange corresponding to a capture oh the incident electron remains very weak in all energy domains. On the other hand in several kinematical situations the taking into account of the inner shell electrons modifies appreciably the results. We also show that in situations of weak incidence energy, where the terms of exchanges are less significant, the application of our all electron approach improves the agreement with the experimental results. In the second section devoted to study of the ionization of diatomic two electron systems, we extend our distorted wave approach ?DWBA? to the study of (e, e2) ionization of Li2. In the absence of experimental results on Li2 we have verified our procedure by reproducing existing experimental results on diatomic hydrogen H2 and given the TDCS for some favorable situations
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Farid El Boudali. Ionisation (e, 2e) du lithium atomique, influence des électrons du coeur dans la détermination, par ondes distordues, de la section efficace triplement différentielle. Autre [cond-mat.other]. Université Paul Verlaine - Metz, 2001. Français. ⟨NNT : 2001METZ035S⟩. ⟨tel-01748967⟩

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