Absolute activity measurement of radon gas at IRA-METAS

Détails

ID Serval
serval:BIB_C43D00524F80
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Absolute activity measurement of radon gas at IRA-METAS
Périodique
Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment
Auteur(s)
Spring P., Nedjadi Y., Bailat C., Triscone G., Bochud F.
ISSN
0168-9002
Statut éditorial
Publié
Date de publication
2006
Peer-reviewed
Oui
Volume
568
Numéro
2
Pages
752-759
Langue
anglais
Résumé
This paper describes the system of the Swiss national metrological institute (IRA-METAS) for the absolute standardisation of radon gas. This method relies on condensing radon under vacuum conditions within a specified cold area using a cryogenerator, and detecting its alpha particles with an ion-implanted silicon detector, through a very accurately defined solid angle. The accuracy of this defined solid angle standardisation technique was corroborated by another primary measurement method involving 4πγ NaI(Tl) integral counting and Monte Carlo efficiency calculations. The 222Rn standard submitted by IRA-METAS to the Système International de Référence (SIR) at the Bureau International des Poids et Mesures (BIPM) has also been found to be consistent with an analogous standard submitted by the German national metrological institute (PTB). IRA-METAS is able to deliver radon standards, with activities ranging from a few kBq to 350 kBq, in NIST-Type ampoules, and glass or steel containers usable for calibrating radon-measuring instruments.
Mots-clé
Radon, Solid-angle particle counting, Primary standard, Traceability, 4πγ counting
Web of science
Création de la notice
25/04/2008 17:53
Dernière modification de la notice
03/03/2018 21:13
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