STOPPING POWER OF A QUANTUM PLASMA - T-MATRIX APPROXIMATION AND DYNAMICAL SCREENING

The stopping power is considered for a dense fully ionized plasma in a binary collision approximation including dynamical screening in the w eak coupling term. The approach is based on an idea first given by Gou ld and DeWitt starting from the Boltzmann and Lenard-Balescu equations [Phys. Rev. 155 (1967) 68]. In this way, strong multiple scattering a s well as collective effects are included in the theory. Explicit resu lts are presented for the stopping power of an electron beam running i nto a quantum electron gas, and a comparison is given of the approxima tion schemes using the pure statically screened T-matrix, the dynamica l RPA screening, and using the combined scheme proposed by Gould and D eWitt.