Abstract
Swift ion energy losses are calculated for nonideal classical and degenerate quantum plasmas on the basis of local field theories. It is shown that correlational effects leading to a difference between average fields and local fields may influence essentially energy losses in such plasmas. In particular, for ions whose velocity v is much smaller than the plasma electron thermal velocity the stopping power increases (for classical plasmas) by a factor 1+(2g/9), g is the classical plasma parameter, as compared with Vlasov approximation. For degenerate quantum plasmas the stopping power increases (under a similar assumption v ≪ vF, vF is the Fermi velocity) in result of the local field effects by a factor which can reach a few tens of percent (as compared with Lindhard stopping power) for some compressed ICF plasmas. Corresponding factors for nonideal degenerate plasmas in some simple metals are as much as 2-3 and are in agreement with experiment.
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