Performance tests of a large volume cerium tribromide (CeBr3) scintillation detector

摘要

The response of a large cylindrical 76 mm x 76 mm (height x diameter) cerium tribromide (CeBr3) detector was measured for prompt gamma rays. The total intrinsic activity of the CeBr3 detector, which was measured over 0.33-333 MeV range, was found to be 0.022 +/- 0.001 counts/s/cm(3). The partial intrinsic activity ( due to Ac-227 contamination), was measured over a energy range of 1.22-2.20 MeV energy, was found to be 0.007 +/- 0.001 counts/s/cm(3). Compared to intrinsic activities of LaBr3:Ce and LaCl3:Ce detectors of equivalent volume, the CeBr3 detector has 7-8 times less total intrinsic activity.