S. Suarez et al., SEARCH FOR FERMI SHUTTLE MECHANISMS IN ELECTRON-EMISSION FROM ATOMIC COLLISION SEQUENCES, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 86(1-2), 1994, pp. 197-200
In electron spectra induced by slow heavy ion bombardment of solids a
high energy tail can be observed, which is suggested to be explained b
y multiple collision sequences. In order to find those multiple collis
ion effects like the ''Fermi shuttle'' acceleration mechanism we measu
red doubly differential electron emission cross sections for H+ (33.5-
700 keV) impact on different targets (He, Ne, C and Au) as a function
of projectile energy and electron emission angle. We observed a surpri
sing target dependence of the electron emission within the range of el
ectron energies close to that of the binary encounter electrons for al
l observed angles of emission.