STOPPING CHARACTERISTICS OF SLOW ANTIPARTICLES

The quantities characterizing stopping including the dynamic width of the particle states, the stopping power and the energy-loss straggling of slow antiparticles (with negative nuclear charges) passing an elec tron gas are evaluated within a scattering theory approach. The requir ed effective scattering potential is obtained from a self-consistent d ensity-functional calculation. The stopping characteristics of antipar ticles as a function of charge \Z(1)\ are quite different from those o f normal particles.