Abstract

Results are given of measurements of the angular and energy distributions of fast neutrons (0·4–3·4 MeV) emerging from water, graphite, aluminium, iron, nickel and lead at the boundary of the medium with water following their passage through thicknesses equal to 1·5–4·6 free path lengths. The neutron source was the 2H(d, n) 3He reaction. The measurements were made with a single-crystal fast-neutron scintillation spectrometer provided with γ-ray discrimination. The results of these measurements are compared with theoretical calculations.

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