Study of radiative capture gamma-rays arising from neutron interactions with iron barriers

This work represents the measured data of the spatial and angular energy distributions of radiative capture ν‐rays produced from the interactions of reactor neutrons with iron barriers of different thicknesses. The measurements were performed, at different angle of neutron incidence and emission of γ‐rays, using a ν‐spectrometer with stilbene scintillator. The measurements show that for barrier’s thickness≥5 cm, the increase of the angle of neutron incidence (to 70°) decreases the value of the capture ν‐ray flux by 1.2–3 times the values obtained when the angle of incidence is 0°. The data also show that the increase in the angle of emission, for barriers ≥5 cm, by 50°–70° decrease the capture ν‐ray flux respectively by ∼2–3 times. The empirical formula describes the present measurements with adequate accuracy (10–15%), is also given.