Fast neutron activation analysis has been applied to bulk carbon detection. DT-neutron generator emitting 14.1 MeV neutrons was used as a source. Prompt 4.44 gammas from the inelastic scattering on were detected using 30% HPGe semiconductor gamma spectrometer shielded primary beam. The sensitivity of experimental setup is discussed. Keywords: Activation analysis; neutrons; Gamma spectrometry.

MIt is the extinction-limited extension of the Bragg peak in reciprocal space3 and a is the divergence (full width) ofthe beam. In numbers, we obtain At/t= 1.86 • iO for the 111 reflection of Si. Thus, a beam divergence of .700 would balance both terms in eq. 1. The neutron flux for such a highly monochromatic beam is very low. Consequently, backscattering spectrometers can only be operated at ...