The Sandwich spectrometer for ultra low-level γ-ray spectrometry

The technical details and performance of the newly developed Sandwich spectrometer for ultra low-level γ-ray spectrometry are presented. The spectrometer, which consists of two HPGe detectors, an active muon shield and a lead/copper shield with a convenient and rapid opening mechanism, is located in...

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Veröffentlicht in:Applied radiation and isotopes 2009-05, Vol.67 (5), p.731-735
Hauptverfasser: Elisabeth Wieslander, J.S., Hult, Mikael, Gasparro, Joël, Marissens, Gerd, Misiaszek, Marcin, Preusse, Werner
Format: Artikel
Sprache:eng
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Zusammenfassung:The technical details and performance of the newly developed Sandwich spectrometer for ultra low-level γ-ray spectrometry are presented. The spectrometer, which consists of two HPGe detectors, an active muon shield and a lead/copper shield with a convenient and rapid opening mechanism, is located in an underground laboratory at a depth of 500 m water equivalent. The data is collected in list mode, which enables off-line data analysis to identify muon-induced events and possible Ge detector crosstalk due to Compton scattering. The background count-rate from 40 to 2700 keV normalised to the mass of the Ge crystals is 220 day −1 kg −1.
ISSN:0969-8043
1872-9800
DOI:10.1016/j.apradiso.2009.01.026