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Primary activity measurements with 4πγ NaI(Tl) counting and Monte Carlo calculated efficiencies

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Title: Primary activity measurements with 4πγ NaI(Tl) counting and Monte Carlo calculated efficiencies
Authors: Nedjadi, Youcef1 youcef.nedjadi@chuv.ch, Spring, Philippe1, Bailat, Claude1, Decombaz, Marc, Triscone, Gilles2, Gostely, Jean-Jacques1, Laedermann, Jean-Pascal1, Bochud, François O.1
Source: Applied Radiation & Isotopes. May2007, Vol. 65 Issue 5, p534-538. 5p.
Subjects: Monte Carlo method, Nuclear reactions, Air pollution, Emissions (Air pollution)
Abstract: Abstract: The radioactive concentrations of 18F, 88Y and 152Eu solutions and the activity of 222Rn gas ampoules are measured using a primary method involving 4πγ NaI(Tl) integral counting with a well-type NaI(Tl) detector and efficiencies computed by Monte Carlo simulations. The simulations use the GEANT code coupled with a routine (sch2for), which generates randomly the decay paths and emissions depending on the decay scheme parameters. The resulting radioactive concentrations of 88Y, 152Eu and 18F are found to agree with those measured with other primary measurement methods, such as 4π (β, e, X)-γ coincidence counting or liquid scintillation counting. Results of the determination of the activity of 222Rn gas ampoules by this method also match the results of an absolute standardisation technique in which radon is condensed onto a cold surface and its α-emissions are detected through an accurately specified solid angle. [Copyright &y& Elsevier]
Copyright of Applied Radiation & Isotopes is the property of Pergamon Press - An Imprint of Elsevier Science 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: 24300346
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Primary activity measurements with 4πγ NaI(Tl) counting and Monte Carlo calculated efficiencies
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  Data: <searchLink fieldCode="JN" term="%22Applied+Radiation+%26+Isotopes%22">Applied Radiation & Isotopes</searchLink>. May2007, Vol. 65 Issue 5, p534-538. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Monte+Carlo+method%22">Monte Carlo method</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+reactions%22">Nuclear reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Air+pollution%22">Air pollution</searchLink><br /><searchLink fieldCode="DE" term="%22Emissions+%28Air+pollution%29%22">Emissions (Air pollution)</searchLink>
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  Data: Abstract: The radioactive concentrations of 18F, 88Y and 152Eu solutions and the activity of 222Rn gas ampoules are measured using a primary method involving 4πγ NaI(Tl) integral counting with a well-type NaI(Tl) detector and efficiencies computed by Monte Carlo simulations. The simulations use the GEANT code coupled with a routine (sch2for), which generates randomly the decay paths and emissions depending on the decay scheme parameters. The resulting radioactive concentrations of 88Y, 152Eu and 18F are found to agree with those measured with other primary measurement methods, such as 4π (β, e, X)-γ coincidence counting or liquid scintillation counting. Results of the determination of the activity of 222Rn gas ampoules by this method also match the results of an absolute standardisation technique in which radon is condensed onto a cold surface and its α-emissions are detected through an accurately specified solid angle. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Applied Radiation & Isotopes is the property of Pergamon Press - An Imprint of Elsevier Science 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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      – SubjectFull: Air pollution
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              Text: May2007
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