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Close-geometry efficiency calibration of p-type HPGe detectors with a Cs-134 point source
P DeFelice1, A Fazio, T Vidmar
1EC Joint Research Centre Ispra, I-21020 Italy.
Abstract:
When close-geometry detector calibration is required in gamma-ray spectrometry, single-line emitters are usually used in order to avoid true coincidence summing effects. We managed to overcome this limitation by developing a method for the determination of the efficiency of p-type HPGe detectors in close-geometry with a calibrated Cs-134 point source. No separate determination of coincidence summing correction factors is required and a single measurement furnishes the full-energy-peak efficiencies in the 475-1365 keV energy range.
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