MOLECULAR DYNAMIC SIMULATIONS OF IONS IN ELECTRON PLASMAS AT STRONG-COUPLING

Molecular dynamic (MD) computer simulations are used to investigate th e stopping of heavy ions in strongly coupled electron plasmas. Our res ults show, that in this regime collisions between the electrons as wel l as non-linear screening effects yield at low ion velocities a depend ence of the stopping power on the ion charge Z which scales like Z(1.4 3) instead of the usual Z(2) In(const/Z)-scaling for weak coupling. Th is is connected with an enhanced local density of electrons around a h ighly charged, slow ion.