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Absolute activity measurement of radon gas at IRA-METAS

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Title: Absolute activity measurement of radon gas at IRA-METAS
Authors: Spring, Philippe1 philippe.spring@chuv.ch, Nedjadi, Youcef1, Bailat, Claude1, Triscone, Gilles2, Bochud, François1
Source: Nuclear Instruments & Methods in Physics Research Section A. Dec2006, p752-759. 8p.
Subjects: Radon, Coal gas, Particles, Alpha rays
Abstract: Abstract: 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 350kBq, in NIST-Type ampoules, and glass or steel containers usable for calibrating radon-measuring instruments. [Copyright &y& Elsevier]
Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 23163433
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  Data: Absolute activity measurement of radon gas at IRA-METAS
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  Data: <searchLink fieldCode="AR" term="%22Spring%2C+Philippe%22">Spring, Philippe</searchLink><relatesTo>1</relatesTo><i> philippe.spring@chuv.ch</i><br /><searchLink fieldCode="AR" term="%22Nedjadi%2C+Youcef%22">Nedjadi, Youcef</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bailat%2C+Claude%22">Bailat, Claude</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Triscone%2C+Gilles%22">Triscone, Gilles</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Bochud%2C+François%22">Bochud, François</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="DE" term="%22Radon%22">Radon</searchLink><br /><searchLink fieldCode="DE" term="%22Coal+gas%22">Coal gas</searchLink><br /><searchLink fieldCode="DE" term="%22Particles%22">Particles</searchLink><br /><searchLink fieldCode="DE" term="%22Alpha+rays%22">Alpha rays</searchLink>
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  Data: Abstract: 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 350kBq, in NIST-Type ampoules, and glass or steel containers usable for calibrating radon-measuring instruments. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.nima.2006.07.055
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 752
    Subjects:
      – SubjectFull: Radon
        Type: general
      – SubjectFull: Coal gas
        Type: general
      – SubjectFull: Particles
        Type: general
      – SubjectFull: Alpha rays
        Type: general
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      – TitleFull: Absolute activity measurement of radon gas at IRA-METAS
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            NameFull: Bailat, Claude
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            NameFull: Bochud, François
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            – D: 01
              M: 12
              Text: Dec2006
              Type: published
              Y: 2006
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