Measurement of the n-p elastic scattering angular distribution at En=10 MeV -: art. no. 014004

The relative cross sections for scattering of neutrons by protons have been measured at E-n = 10 MeV for center-of-mass neutron scattering angles from 60degrees to 180degrees. Absolute differential cross section values were obtained by normalizing the angle-integrated relative angular distribution to the n-p total cross section. The angular distribution exhibits a backward enhancement consistent with an exchange component of the n-p interaction at this energy. The relative shape of the angular distribution is in good agreement with the prediction of the charge-dependent Bonn and Nijmegen potential models and with the Arndt phase-shift analysis. Better agreement is found with the evaluated nuclear data files (ENDF)/B-V than with the ENDF/B-VI evaluation.