Assessment of various reflectors used with rectangular scintillation detectors

Abstract

The use of various types of reflector with two simulated rectangular scintillation detectors (40.5 cm*15.2 cm*6.3 cm and 60.0 cm*40.5 cm*6.3 cm) has been investigated with respect to the efficiency and uniformity of light collection, by means of optical model experiments. It is shown that good efficiency and uniformity of light collection can be achieved by collecting light from one end of the detector only, through a single light guide, provided that the basic method of light reflection employed is total internal reflection. Various specular or diffuse reflectors placed close to, but not in optical contact with, the surfaces of the detectors increased the collection of light without seriously affecting the uniformity.