title: An absolute radon 222 activity measurement system at LNE-LNHB.
abstract: A good metrological traceability of radon and progenies is necessary to accurately measure the radon concentration. In 1995, at the LNE-LNHB, J.L. Picolo developed a reference method using a defined-solid-angle (DSA) alpha spectrometer to measure a frozen radon source. With this method it was possible to measure radon standards with a relative standard uncertainty of 0.5%. This paper presents the design and the characterization of a new upgraded measurement system; all parameters and their uncertainties are discussed. This new system allows the measurement of radon sources from 100Bq to 4MBq with a relative standard uncertainty of 0.3%.
authors.affiliation: CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Centre de Saclay, 91191 Gif-sur-Yvette, France. Electronic address: benoit.sabot@cea.fr.
authors.forename: B
authors.initials: B
authors.lastname: Sabot
authors.affiliation: CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Centre de Saclay, 91191 Gif-sur-Yvette, France.
authors.forename: S
authors.initials: S
authors.lastname: Pierre
authors.affiliation: CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Centre de Saclay, 91191 Gif-sur-Yvette, France.
authors.forename: P
authors.initials: P
authors.lastname: Cassette
keywords: Po-214; Po-218; Primary standard; Radon; Rn-222