Reflection coefficients of particles scattered at surfaces: H, D-W, H, Ar-Al and D-C, Ar-Ge

Reflection coefficients and angular distributions of scattered particles in bombarding various practically applicable targets with H, D and Ar atoms have been calculated in a wide range of incident angles and energies. In the case of glancing angles and crystalline targets, the reflection coefficient of almost 100% has been observed. This effect should be taken into account in calculating energy input into the divertor material and in designing protective screens for spacecrafts.