Development of a primary thoron activity standard for the calibration of thoron measurement instruments.
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.
CEA, LIST, LNHB, CEA Saclay, Gif-sur-Yvette F-91191, France Institut de Radioprotection et de Sûreté Nucléaire (IRSN) PSN-RES, SCA, LPMA, Centre de Saclay, Gif-sur-Yvette 91192, France benoit.sabot@cea.fr.
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B
Sabot
CEA, LIST, LNHB, CEA Saclay, Gif-sur-Yvette F-91191, France.
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S
Pierre
CEA, LIST, LNHB, CEA Saclay, Gif-sur-Yvette F-91191, France.
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Cassette
Institut de Radioprotection et de Sûreté Nucléaire (IRSN) PSN-RES, SCA, LPMA, Centre de Saclay, Gif-sur-Yvette 91192, France.
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N
Michielsen
Institut de Radioprotection et de Sûreté Nucléaire (IRSN) PSN-RES, SCA, LPMA, Centre de Saclay, Gif-sur-Yvette 91192, France.
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Bondiguel
D000512:Alpha Particles; D004867:Equipment Design / Q000592:standards; D019544:Equipment Failure Analysis / Q000592:standards; D005602:France; D038622:Internationality; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation* / Q000592:standards*; D011886:Radon / Q000032:analysis* / Q000592:standards*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D011886:Radon