New effective organic scintillators for fast neutron and short-range radiation detection

Abstract

This paper describes the techniques used for making new organic scintillators and detectors based on these scintillators. Research has focused on designing large dimension organic scintillators to increase the efficiency of detecting ionizing radiation. The techniques described here have allowed us to produce 1) organic crystals of stilbene and p-terphenyl with diameters up to 120 mm and heights up to 100 mm; 2) p-terphenyl polycrystals doped with diphenylbutadiene molecules, as well stilbene polycrystals up to 250 mm in diameter and 5 mm in height; 3) the first prototypes of a composite scintillation material based on stilbene grains added to a silicone glue base, achieving a high efficiency of fast neutron detection.