From S and S.R and AR can be calculated 2500 600 in si 500 Phosphorus R 600 AR (A) Arsenic 2000 Gallium 200 50100150200 Energy(kev) rgy(ke v) in si 7000 700 in gaAs 6000 Range urger Range Silicon 4000 AR AR Selenium 2000 500 200 Silicor tellurium 100 200 50100150200 Energy(keV) (G) nergy( ke v)3.155J/6.152J, 2003 15 From Se and Sn, Rp and DRp Rp DRp in Si in Si in Si in GaAs Rp DRp Rp (Å) DRp R DRp p (Å) can be calculated: (Å) (Å)