Stopping powers of some metals for 0.3–1.5 mev protons

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Abstract
The stopping powers of Al, Ti, Ni, Cu, Zn, Mo, Ag, Ta, W and Au for protons were measured over the energy range Ep = 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 (Hydrogen Stopping Powers and Ranges in All Elements, H. H. Andersen and J. F. Ziegler) and earlier available absolute data. The values of the present experiment agree rather well at the high-energy end with the “best-fit values”. At low energies there occur discrepancies, the present data being usually a few per cent lower than the “best-fit values”.