Abstract
The cross section for scattering of protons by protons has been measured at angles from 15\ifmmode^\circ\else\textdegree\fi{} to 45\ifmmode^\circ\else\textdegree\fi{} for protons of energies 860, 1200, 1390, 2105 and 2392 kev. Observed scattering cross sections at 15\ifmmode^\circ\else\textdegree\fi{} are close to Mott values for all energies. Ratios of observed cross section to Mott cross section rise with increasing angle and with increasing proton energy. At 45\ifmmode^\circ\else\textdegree\fi{} the ratio rises from 3.90 at 860 kev to 42.9 at 2392 kev. At 1830 kev measurements were made at scattering angles up to 60\ifmmode^\circ\else\textdegree\fi{} and the scattering cross section showed the theoretically expected asymmetry ($cos\ensuremath{\theta}$) about 45\ifmmode^\circ\else\textdegree\fi{}. As a check on the proton-proton measurements the scattering of protons from argon and krypton was investigated with protons of energies between 850 kev and 2440 kev.
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