Abstract
Abstract A low-background high-resolution Ge detector surrounded by neutron scatterers is shown to be used as a low-background neutron counter for fast (1–5 MeV) neutrons. The neutron flux and the energy are obtained by measuring yields of the γ-rays following inelastic scattering of fast neutrons by nuclei in the scatterer and the γ-ray branching ratios, respectively. Detection efficiencies, including solid angles, are ϵn = 10−3−10−4, and the minimum neutron flux (sensitivity) to be detected is Sn = 2.5−5 × 10−3 (3−6 × 10−4) neutrons per second for one week (year) of measurements.
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