Stilbene composite scintillators as detectors of fast neutrons emitted by a 252Cf source

摘要

The results of the measurements are presented of the relative efficiency ε for ~(252)Cf fast neutron detection by composite detectors based on stilbene crystalline grains. The effects of the grain size and height of the composite detector on its scintillation properties were studied. It is shown that the efficiency of fast neutron detection of stilbene composite scintillators ranges up to 60% of that of bulk single crystals. The results are also presented for relative light output measurements of stilbene composite detectors irradiated by gamma photons of ~(137)Cs, as well as transmittance data of samples in the range of their transparency absorption.