An absolute radon 222 activity measurement system at LNE-LNHB

Benoît Sabot (1) , S. Pierre (1) , P. Cassette (1)

1 LNHB (CEA, LIST) - Laboratoire National Henri Becquerel (CEA, LIST)

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 100 Bq to 4 MBq with a relative standard uncertainty of 0.3%.

Mots clés: Rn-222; Po-218; Po-214; Radon; Primary standard; spectrometry

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Instrumentations et Détecteurs [physics.ins-det]

Benoît Sabot, S. Pierre, P. Cassette. An absolute radon 222 activity measurement system at LNE-LNHB. Applied Radiation and Isotopes, 2016, 118, pp.167 - 174. ⟨10.1016/j.apradiso.2016.09.009⟩. ⟨hal-01869403⟩