Abstract
The performance characteristics of four compact, room-temperature detectors-two scintillators and two semiconductor detectors-were studied. All are commercially available detectors. The two scintillators were a o13 mm/spl times/13 mm lanthanum chloride [LaCl/sub 3/(Ce)] detector and a o25 mm/spl times/25 mm sodium iodide [NaI(Tl)] detector. The two semiconductor detectors were a 10/spl times/10/spl times/3 mm/sup 3/ cadmium zinc telluride (CZT) detector with a coplanar gridded anode and a 5/spl times/5/spl times/5 mm/sup 3/ CZT detector with an extended cathode. The efficiency, resolution, and peak shape of these devices are compared. Since LaCl/sub 3/(Ce) is a relatively new commercial scintillator material, additional information on the performance of this detector is presented. Specifically, the impact of naturally occurring radioactive /sup 138/La and additional contamination from alpha-emitting radionuclides on the background measured with this detector are discussed.
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