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Environmental radionuclides as contaminants of HPGe gamma-ray spectrometers: Monte Carlo simulations for Modane underground laboratory
R. Breier, VB. Brudanin, P. Loaiza, F. Piquemal, PP. Povinec, E. Rukhadze, N. Rukhadze, I. Štekl,
Jazyk angličtina Země Anglie, Velká Británie
Typ dokumentu časopisecké články
- MeSH
- laboratoře MeSH
- metoda Monte Carlo MeSH
- monitorování radiace * MeSH
- počítačová simulace MeSH
- radioaktivní znečišťující látky analýza MeSH
- radionuklidy MeSH
- spektrometrie gama * MeSH
- thorium analýza MeSH
- uran analýza MeSH
- záření gama MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Francie MeSH
The main limitation in the high-sensitive HPGe gamma-ray spectrometry has been the detector background, even for detectors placed deep underground. Environmental radionuclides such as 40K and decay products in the 238U and 232Th chains have been identified as the most important radioactive contaminants of construction parts of HPGe gamma-ray spectrometers. Monte Carlo simulations have shown that the massive inner and outer lead shields have been the main contributors to the HPGe-detector background, followed by aluminum cryostat, copper cold finger, detector holder and the lead ring with FET. The Monte Carlo simulated cosmic-ray background gamma-ray spectrum has been by about three orders of magnitude lower than the experimental spectrum measured in the Modane underground laboratory (4800 m w.e.), underlying the importance of using radiopure materials for the construction of ultra-low-level HPGe gamma-ray spectrometers.
Joint Institute for Nuclear Research 141980 Dubna Russia
Laboratoire Souterrain de Modane F 73500 Modane France
LAL Université Paris Sud CNRS IN2P3 Université Paris Saclay F 91405 Orsay France
Université de Bordeaux CNRS IN2P3 CENBG F 33175 Gradignan France
Citace poskytuje Crossref.org
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- $a The main limitation in the high-sensitive HPGe gamma-ray spectrometry has been the detector background, even for detectors placed deep underground. Environmental radionuclides such as 40K and decay products in the 238U and 232Th chains have been identified as the most important radioactive contaminants of construction parts of HPGe gamma-ray spectrometers. Monte Carlo simulations have shown that the massive inner and outer lead shields have been the main contributors to the HPGe-detector background, followed by aluminum cryostat, copper cold finger, detector holder and the lead ring with FET. The Monte Carlo simulated cosmic-ray background gamma-ray spectrum has been by about three orders of magnitude lower than the experimental spectrum measured in the Modane underground laboratory (4800 m w.e.), underlying the importance of using radiopure materials for the construction of ultra-low-level HPGe gamma-ray spectrometers.
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- $a Povinec, P P $u Comenius University, Faculty of Mathematics, Physics and Informatics, Department of Nuclear Physics and Biophysics, 84248 Bratislava, Slovakia. Electronic address: povinec@fmph.uniba.sk.
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