| Autor: |
Beloshitsky, V. V., Kumakhov, M. A. |
| Zdroj: |
Radiation Effects; Jan1978, Vol. 35 Issue 4, p209-216, 8p |
| Abstrakt: |
The methods due to Bloch and Pines have been used to calculate the energy loss of channeled protons. The contribution from the various atomic shells to the stopping power is assumed to be additive. The collective effects in a solid plasma produced by the valence electrons are calculated disregarding the band structure. The nonuniform distribution of valence electrons across the channel is taken into account. In contrast to Robinson and Dettmann, a detailed summation is performed over the spectrum of oscillator strengths when calculating the energy loss due to inner-shell electrons. It has been found that, contrary to the common belief, the energy loss due to inner-shell electrons is considerable even for wide channels, whereas the energy loss due to the valence electrons turns out to be lower. The numerical calculations for silicon and germanium have yielded results that agree well with experiment. The energy loss at relativistic velocities has also been calculated. The obtained results may be used for quantitative predictions of energy loss in channeling experiments. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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