Physicist, National Institute of Standards and Technology, Gaithersburg, MD
(Received 20 June 2005; accepted 25 October 2005)
A proposed set of photonuclear cross sections was used to calculate the neutron spectrum of a RaBe photoneutron source. The calculation used the gamma rays from 226Ra in equilibrium as a driver, transported the gamma rays through the materials of the source, calculated neutron production, and subsequent neutron scattering. The calculation produced 27 % more neutrons than measured, and predicted relatively more low-energy neutrons.
Paper ID: JAI13474