Development of a primary thoron activity standard for the calibration of thoron measurement instruments. Issue 1 (24th April 2015)

• Record Type: Journal Article
• Authors: Sabot, B.; Pierre, S.; Cassette, P.; Michielsen, N.; Bondiguel, S.
• Is Part Of: Radiation protection dosimetry. Volume 167:Issue 1/3(2015)
• Page Start: 70
• Page End: 74
• Publication Date: 2015-04-24
• Subjects: Radiation dosimetry -- Periodicals; Radiation -- Safety measures -- Periodicals; 363.1799
• DOI: 10.1093/rpd/ncv221
• Languages: English
• ISSNs: 0144-8420

Abstract

Abstract : The LNHB and IRSN are working on a reference atmosphere for thoron ( 220 Rn) instrument calibration. The LNHB, as the national metrology institute for activity measurement in France, has to create a new thoron reference standard in order to estimate with accuracy the thoron concentration of a reference atmosphere. The measurement system presented in this paper is based on a reference volume using an alpha detector, which is able to measure thoron and its decay products to define the thoron concentration of a thoron reference atmosphere. This paper presents the first results with this new system using a well-known radon ( 222 Rn) atmosphere and a thoron ( 220 Rn) atmosphere.