A high precision n-p scattering measurement at 14.9 MeV

¹ Department of Physics and Astronomy, Ohio University, Athens, OH 45701, USA
² National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
³ Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
⁴ Department of Physics, University of Guelma, Guelma 24000, Algeria

^a e-mail: kornilov@ohio.edu
^b Deceased

Published online: 13 September 2017

Abstract

The n-p scattering angular distribution was measured with 14.9 MeV incident neutrons using the traditional time-of-flight technique with neutron-gamma discrimination. The scattering angle varied from 20^o to 65^o (laboratory system) in 5^o incremental steps. The efficiency of the neutron detectors was measured in the energy range 2–9 MeV relative to the ²⁵²Cf-standard, and was calculated using Monte Carlo methods in the 2–14 MeV energy range. Two methods of analysis were applied for experimental and simulated data: a traditional approach with a fixed threshold, and a dynamic threshold approach. The present data agree with the ENDF/B-VII evaluation for the shape of n-p angular distribution within about 1.5%.