Abstract
A method was proposed for bulk hydrogen analysis. It is based on simultaneous detection of transmitted fast neutrons and back scattered thermal neutrons from the investigated samples by He-3 detectors. The fast neutron beams were obtained from Cf-252 and Pu-Be neutron sources. The experimental set-up as well as samples preparation were described. Incident thermal neutrons beams obtained from either Cf-252 or Pu-Be sources, were used to investigate the samples by neutron backscattering. The results obtained from transmission and backscattering of fast neutrons were compared and discussed. The advantage and capabilities of the proposed method were presented. The results obtained using fast neutron beams are more sensitive than those obtained using thermal neutron beams. Validation procedures were proposed to credit the results.