Molecular dynamics simulations of atomic carbon on tungsten surface

By means of molecular dynamics simulations using bond-order potential, we have investigated the behavior of atomic carbon on both bcc tungsten (0 0 1) surface, and amorphous tungsten surface that is formed by a simulated annealing process, at finite temperature (T = 300 K) with incident energy ranging from 0.5 eV to 200 eV. The particle and energy reflection coefficients as well as mean range distribution as a function of incident energy at normal incidence have been calculated and the channeling effect in the energy range above 100 eV has also been discussed. The results are compared with those calculated by Eckstein using binary collision (BC) Code TRIM.SP in the energy range from 55 eV to 200 eV.