Abstract
Three different gamma-ray counting systems constructed by 1–3 HPGe detectors were used in this study to compare their system performance. One measurement scheme involved positioning a single HPGe detector on a movable cart with a 90° collimation angle to the observed item. The other two waste assay systems were configured with two or three HPGe detectors towards the sample drums, while the three-HPGe-detector counting system was in a shielded counter cavity. The measurement consistency of 38 low-level waste drums, system operating costs and acquisition times to achieve the same MDA for these counting systems were compared and discussed in this study.
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