Differential Cross Section for Neutron-Proton Scattering at 14.1 MeV

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The n-p differential cross sections at 14.1 Mev were measured with a counter telescope at 8 angles in the range from 172.0° to 52.5° in the center-of-mass system. A least squares fit of the data gives the center-of-mass differential cross section: σ(Θn)=52.9 (1−0.0639cosΘn+0.0288cos2Θn) mb/sr, which is clearly asymmetric about 90°. The ratio of the cross sections at 180° and 90° is 1.093±0.022, and the total cross section is 671±10 mb. The present results are in good agreement with the theoretical results based on the one-pion-exchange potentials.


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