Elsevier

Nuclear Physics

Volume 86, Issue 1, October 1966, Pages 119-129
Nuclear Physics

Cross sections as a function of energy for the scattering of protons from 12C

https://doi.org/10.1016/0029-5582(66)90295-1Get rights and content

Abstract

The scattering of protons from carbon in the range of incident energies 4.7 to 12.8 MeV has been investigated using a tandem Van de Graaff accelerator and a differentially pumped gas scattering chamber. Absolute differential cross sections for elastic scattering and for the inelastic scattering reactions 12C(p, p′)12C (Q = −4.43 MeV) and 12C(p, p″)12C (Q = −7.66 MeV) were measured at laboratory angles of 25.54°, 85.22°, 105.23°, 121.16°, 137.52° and 159.45° as a function of energy in steps of 2.5 to 20 keV. Of particular interest is the splitting of the known resonance at 9.14 MeV, indicating a previously unknown level.

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    Using a proton beam with energy of approximately 8 MeV or higher, the carbon concentration in the depth region of more than 20 μm, in case of the silicon substrate, can be analyzed with this method. Quantitative analysis of carbon concentrations is possible, because the cross sections of the 12C(p, p′) reaction have been precisely measured over a wide energy range [6,7]. Utilization of this analytical method is planned for the analysis of SiC formed by ion beam synthesis using carbon ions with energies of several tens of MeV.

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Now at the University of Florida, Gainesville, Florida.

††

NASA Fellow in Physics, now at the University of Wisconsin, Madison, Wisconsin.

†††

Now at the University of Kentucky, Lexington, Kentucky.

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