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Etude de la diffusion de particules lourdes sur des systèmes atomiques et nucléaires

Abstract : In this thesis quantum mechanical non-relativistic few-body problem is discussed. Basing on fundamentals ideas of Faddeev and Yakubovski three and four body equations are formulated and solved for fermionic atomic and nuclear systems. Former equations are modified to include long range interactions. Original results for nuclear and molecular physics were obtained : - Positively charged particle scattering on Hydrogen atoms was considered. Predictions for $\pi^(+)$-H, $\mu^(+)$-H and p$^(+)$-H scattering lengths were given. Existence of an unknown, very weakly bound H$^(+)_(2)$ bound state was predicted. - Motivated by the possible observation of bound four neutron structure at GANIL we have studied compatibility of such an existence within the current nuclear interaction models. - 4 nucleon scattering at low energies was investigated. Obtained results for n-3H, p-3H and p-3He systems were compared with the experimental data. Validity of realistic nucleon-nucleon interaction models is questioned.
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  • HAL Id : tel-00004178, version 1



Rimantas Lazauskas. Etude de la diffusion de particules lourdes sur des systèmes atomiques et nucléaires. Physique mathématique [math-ph]. Université Joseph-Fourier - Grenoble I, 2003. Français. ⟨tel-00004178⟩



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