Gm. Sigaud et al., SATURATION EFFECTS IN PROJECTILE ELECTRON LOSS, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 132(2), 1997, pp. 312-315
The behavior of the projectile electron-loss cross sections with the t
arget atomic number, Z(2), presents a saturation as the value of Z(2)
increases. This fact, which had already been observed for the excitati
on of highly charged projectiles, appears in the first-order calculati
ons for the contribution of the projectile electron-target electron in
teraction but not for the projectile electron-target nucleus interacti
on. In this work, we compare total electron-loss cross sections with E
lectron Loss to the Continuum (ELC) yields, for 1.0 MeV He+ projectile
on various targets, with atomic numbers ranging from 2 to 54. Besides
a similar saturation with Z(2) observed in both cases, some differenc
es between the data appear, such as enhanced values of the total loss
for all targets when compared to the ELC and a structure between the A
r and Xe targets also in the total loss data. These differences may be
assigned to the contribution due to the interaction between the proje
ctile active electron and the target electron cloud. (C) 1997 Elsevier
Science B.V.