Obelix, a New Low-Background HPGe at Modane Underground Laboratory
- NázevTitle
- Obelix, a New Low-Background HPGe at Modane Underground LaboratoryObelix, a New Low-Background HPGe at Modane Underground Laboratory
- Druh výsledkuResult type
- Příspěvek ve sborníkuProceedings paper
- AutořiAuthors
- P. Loaiza, V. Brudanin, F. Piquemal, E. Rukhadze, N. Rukhadze, I. Štekl, G. Warot, M. Zampaolo
- Klíčová slovaKeywords
- gamma- Ray, spectrometry, low background
- KonferenceConference
- 5th Topical Workshop on Low Radioactivity Techniques (Seattle, United States, 2015-03-18)
- DOIDOI
- 10.1063/1.4928012
- Časopis / citaceJournal / citation
- In: AIP Conference Proceedings 1672, AIP Publishing LLC, 2015, pp. 130002 · ISSN 0094-243X
- RokYear
- 2015
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Speciální detekční techniky používané v podzemních experimentech, na urychlovačích v CERN a v NMRAdvanced detection methods used in underground physics, on accelerators at CERN and NMR; Neurychlovačová astročásticová fyzika v podzemní laboratoři LSM (Francie)Non-accelerator astroparticle physics in the Modane Underground Laboratory (LSM, France); Příspěvek k rozšíření velké výzkumné infrastruktury evropského významuContribution of the Czech Republic to the extension of the large research infrastructure of European importance
- CitovánoCited by
- 13 (INSPIRE-HEP)
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
An ultra-low background coaxial HPGe detector for gamma-ray spectrometry with a relative efficiency of 160%, corresponding to a 600 cm3 Ge crystal, was installed at the Laboratoire Souterrain de Modane, France (4800 m.w.e). To reduce the instrinsic detector background, all parts involved in the detector cryostat were selected for their low radioactivity contamination. A shielding, composed of an inner layer of roman lead and an external layer of regular lead was installed, together with a system to reduce the Rn level inside the sample chamber. The shielding was designed to allow the measurement of Marinelli-shaped samples. We present the constructional details which lead to a remarkable low detector background of 73 cts/kg·d in [40, 3000] keV. Measured samples showed that sensitivities about 100 μBq/kg in 226Ra and 228Th are reached for samples of some kg and 30 days of lifetime.
An ultra-low background coaxial HPGe detector for gamma-ray spectrometry with a relative efficiency of 160%, corresponding to a 600 cm3 Ge crystal, was installed at the Laboratoire Souterrain de Modane, France (4800 m.w.e). To reduce the instrinsic detector background, all parts involved in the detector cryostat were selected for their low radioactivity contamination. A shielding, composed of an inner layer of roman lead and an external layer of regular lead was installed, together with a system to reduce the Rn level inside the sample chamber. The shielding was designed to allow the measurement of Marinelli-shaped samples. We present the constructional details which lead to a remarkable low detector background of 73 cts/kg·d in [40, 3000] keV. Measured samples showed that sensitivities about 100 μBq/kg in 226Ra and 228Th are reached for samples of some kg and 30 days of lifetime.