PRODUCTION AND TRANSPORT OF CONVOY ELECTRONS IN THE CHARGE PREEQUILIBRIUM OF IONS IN SOLIDS
Résumé
Absolute double differential convoy electron spectra of light atomic projectiles (H+, H°, He+) (1.2 ≤ Ep/Mp ≤ 3 MeV/u ) traversing thin carbon foils (2 ≤ ρx ≤ 20 µg/cm2) were measured as function of the projectile velocity and the target thickness ρx. In the charge praeequilibrium the convoy electron yield is strongly dependent on the initial charge state qi of the projectile ion and can be described by a two step model which includes the production of convoy electrons as a function of charge changing and excitation processes and their projectile independent transport through the solid. Both the two distinguishable convoy electron structures in the spectra can be represented by calculations of energy loss distributions using an extended Landau-Vavilov model.
Domaines
Articles anciens| Origine | Accord explicite pour ce dépôt |
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