Stopping Power of Al, Cu, Ag, Au, Pb, and U for 5—18-MeV Protons and Deuterons
- 1 September 1973
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 8 (5), 1854-1863
- https://doi.org/10.1103/physrevb.8.1854
Abstract
The stopping power of Al, Cu, Ag, and Au has been measured for 9—18-MeV protons and deuterons in order to extend earlier Risö measurements covering the energy range 5—12 MeV. Furthermore, the stopping power of Pb and U was measured in the energy range 5—18 MeV. The standard deviation of the new data for the first four materials is 0.4%, while for Pb and U it is 0.6% and 0.8%, respectively. The mean excitation potential for copper is deduced to be 319.8 ± 3.2 eV, in good agreement with our earlier results. Excitation potentials for Ag, Au, U, and Pb are also extracted from the data. The results for the Pb and U support the view that the ratio between the mean excitation potential and the atomic number (the Bloch "constant") is an oscillatory function of the atomic number.Keywords
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