STOPPING POWERS OF SOME METALS FOR 0.3-1.5 MEV PROTONS

The stopping powers of Al, Ti, Ni, Cu, Zn, Mo, Ag, Ta, W and Au for protons were measured over the energy range E**p equals 0. 3-1. 5 MeV by the elastic backscattering technique. In the case of Al, Cu, Ag and Au the thin-film method was used. The areal densities of the films were gravimetrically measured. The thick-target scattering yields were employed in the calculation of the stopping powers of Ti, Ni, Zn, Mo, Ta, and W relative to those of the absolute measurements. The experimental accuracy of the absolute stopping values is estimated at 1. 5-2. 5% and that of the relative values at 2. 2-3. 5% The results obtained were compared with the best-fit values from a recent compilation and earlier available absolute data.