Dependence of electronic energy loss of light ions on the angle of emergence

Screening and antiscreening in the semiclassical description of ionization in fast ion-atom collisions

“…The probability of electron loss as a function of impact parameter is important for interpretation of the results of channeling experiments with heavy ions (see, for example, L'Hoir et ai 1990). The impact parameter dependence of the ionization probability is necessary in calculation of the energy loss of heavy ions (see discussion in a review paper by Kabachnik (1992) and references therein). It is obvious that the screening effect determines the effective charge of the ion in electronic energy-loss process.…”

“…Besides ionization probability the mean energy transferred in the collision as well as the mean energy squared are calculated. These quantities are important in the analysis of stopping power and energy straggling for a beam of ions penetrating matter (see discussion in Kabachnik et a1 1988, Kabachnik 1992). The screening effect in the impact parameter dependence of the mean energy loss and the mean square of the transferred energy, is also characterized by the corresponding effective charges.…”