Spectra of convoy electrons (CE) from a 20 μg/cm2 C-foil at the impact of 200-1000 keV H+ and 800 keV He+ ions have been measured. In the case of He+ projectiles the electrons were detected in coincidence with the outgoing He+ and He2+ ions. The asymmetry of the CE peak was investigated by fitting the spectra with a theoretical formula developed for studies in ion-atom collisions. We found the shapes of the CE peaks measured in coincidence with the He+ and He2+ projectiles symmetric and similar to each other. The shape of the CE peak at the impact of H+ projectiles, however, was found to be asymmetric and enhanced towards lower electron energies. The asymmetry parameter obtained for the CE peak did not depend on the projectile energy in the region of 200-1000 keV.
|Number of pages||4|
|Journal||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|Publication status||Published - Apr 1997|
ASJC Scopus subject areas
- Nuclear and High Energy Physics