RARE-EARTH HALIDE CRYSTAL SCINTILLATOR WITH POLISHED SENSITIVE FACE

摘要

A single-crystal scintillator material can include at least 50 wt % of rare-earth halide and comprising a polished first face. This material is integrated into an ionizing-radiation detector comprising a photoreceiver, the photoreceiver being optically coupled to the material via a face other than the polished first face. The material provides a good energy resolution and a high light intensity. The polishing may be carried out whatever the crystal orientation of the crystal. Loss of material due to this orientation is therefore prevented.

主权项

1. A scintillation detector for detecting incident radiation belonging to a range from 1 to 100 keV, comprising a single-crystal scintillator material and a photoreceiver,
said single-crystal scintillator material comprising:
a flat polished radiation entrance face;a coupled face opposite the radiation entrance face, the coupled face being rougher than the radiation entrance face and coupled to the photoreceiver; andat least 50 wt % of rare-earth halide, wherein the scintillator detector has an energy resolution value PHR lower than 55% when the polished radiation entrance face is exposed to a radiation from an Fe55 source at 5.9 keV.