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In this study we present the experimental differential cross sections of the natO(p,p 0) elastic scattering, determined via the relative measurement technique, in the proton beam energy range E lab = 4–6 MeV with a varying step (from 5 to 15 keV), at six backscattering detector angles between 120° and 170° (every 10°). A thin, self-supporting target manufactured was used in this experiment and the determination of its stoichiometry was carried out according to the currently existing evaluation at lower energy, which has also been benchmarked recently. The measurements were performed using the Van de Graaff Tandem 5.5 MV Accelerator of N.C.S.R. "Demokritos" in Athens, Greece. Theoretical calculations leading to the extension of the existing evaluation up to E p,lab ∼ 6 MeV have also been performed and the obtained results seem to reproduce well not only the differential cross-section datasets obtained in the present work, but also already existing ones in literature for this extended proton beam energy range. The observed peculiarities and discrepancies are discussed and analyzed, while the theoretical differential cross sections are validated via an accurate benchmarking experiment carried out at RUBION, Ruhr University Bochum, using a thick Bi 2 O 3 target. [ABSTRACT FROM AUTHOR]

The differential cross section values of the natSi(p,p 0) elastic scattering were determined in the energy range of E p,lab = 3000–5000 keV at 6 backscattering detection angles (120°, 130°, 140°, 1 50°, 160° and 170°). The target was a self-supported thin Si 3 N 4 foil. In addition, a thick crystalline silicon wafer was irradiated on its unpolished side with protons at energies E p,lab = 3200, 3400, 3600, 3850, 4100, 4300, 4500, 4740, 5000 keV, in order to validate the results of the first experiment. On top of both targets a thin layer of 197Au was evaporated for normalization purposes. Both measurements were performed in parallel, using the 5.5 MV TN11 HV Tandem Accelerator and the high precision goniometer of N.C.S.R. 'Demokritos', Athens, Greece. The experimental and data analysis processes are presented in detail, as well as, comparisons between the obtained differential cross sections and already existing datasets in literature, along with the benchmarking results. [ABSTRACT FROM AUTHOR]