Precise determination of HPGe detector efficiency for gamma spectrometry measurements of environmental samples with variable geometry and density
A methodology to determine the full energy peak efficiency (FEPE) for precise gamma spectrometry measurements of environmental samples with high-purity germanium (HPGe) detector, valid when this efficiency depends on the energy of the radiation E, the height of the cylindrical sample H, and its dens...
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Sciendo
2017-03-01
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| Series: | Nukleonika |
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| Online Access: | https://doi.org/10.1515/nuka-2017-0007 |
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doaj-36239b15d5ce4118ae5e6ce00d9dec2e2021-09-06T19:21:15ZengSciendoNukleonika0029-59222017-03-01621475910.1515/nuka-2017-0007nuka-2017-0007Precise determination of HPGe detector efficiency for gamma spectrometry measurements of environmental samples with variable geometry and densityBarrera Manuel0Casas-Ruiz Melquiades1Alonso José J.2Vidal Juan3Group of Environmental Radioactivity, Applied Physics Department, CEIMAR, University of Cadiz, Avda. Rep. Saharaui s/n, Puerto Real 11510, Cádiz, Spain, Tel.: +34 956 483 419, Fax: +34 956 015 10Group of Environmental Radioactivity, Applied Physics Department, CEIMAR, University of Cadiz, Avda. Rep. Saharaui s/n, Puerto Real 11510, Cádiz, Spain, Tel.: +34 956 483 419, Fax: +34 956 015 10Group of Environmental Radioactivity, Applied Physics Department, CEIMAR, University of Cadiz, Avda. Rep. Saharaui s/n, Puerto Real 11510, Cádiz, Spain, Tel.: +34 956 483 419, Fax: +34 956 015 10Group of Environmental Radioactivity, Applied Physics Department, CEIMAR, University of Cadiz, Avda. Rep. Saharaui s/n, Puerto Real 11510, Cádiz, Spain, Tel.: +34 956 483 419, Fax: +34 956 015 10A methodology to determine the full energy peak efficiency (FEPE) for precise gamma spectrometry measurements of environmental samples with high-purity germanium (HPGe) detector, valid when this efficiency depends on the energy of the radiation E, the height of the cylindrical sample H, and its density ρ, is introduced. The methodology consists of an initial calibration as a function of E and H and the application of a self-attenuation factor, depending on the density of the sample ρ, in order to correct for the different attenuation of the generic sample in relation to the measured standard. The obtained efficiency can be used in the whole range of interest studied, E = 120–2000 keV, H = 1–5 cm, and ρ = 0.8–1.7 g/cm3, being its uncertainty below 5%. The efficiency has been checked by the measurement of standards, resulting in a good agreement between experimental and expected activities. The described methodology can be extended to similar situations when samples show geometric and compaction differences.https://doi.org/10.1515/nuka-2017-0007efficiency calibrationenvironmental radioactivitygamma spectrometrygeometric dependence of the efficiencyself-attenuation corrections |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Barrera Manuel Casas-Ruiz Melquiades Alonso José J. Vidal Juan |
| spellingShingle |
Barrera Manuel Casas-Ruiz Melquiades Alonso José J. Vidal Juan Precise determination of HPGe detector efficiency for gamma spectrometry measurements of environmental samples with variable geometry and density Nukleonika efficiency calibration environmental radioactivity gamma spectrometry geometric dependence of the efficiency self-attenuation corrections |
| author_facet |
Barrera Manuel Casas-Ruiz Melquiades Alonso José J. Vidal Juan |
| author_sort |
Barrera Manuel |
| title |
Precise determination of HPGe detector efficiency for gamma spectrometry measurements of environmental samples with variable geometry and density |
| title_short |
Precise determination of HPGe detector efficiency for gamma spectrometry measurements of environmental samples with variable geometry and density |
| title_full |
Precise determination of HPGe detector efficiency for gamma spectrometry measurements of environmental samples with variable geometry and density |
| title_fullStr |
Precise determination of HPGe detector efficiency for gamma spectrometry measurements of environmental samples with variable geometry and density |
| title_full_unstemmed |
Precise determination of HPGe detector efficiency for gamma spectrometry measurements of environmental samples with variable geometry and density |
| title_sort |
precise determination of hpge detector efficiency for gamma spectrometry measurements of environmental samples with variable geometry and density |
| publisher |
Sciendo |
| series |
Nukleonika |
| issn |
0029-5922 |
| publishDate |
2017-03-01 |
| description |
A methodology to determine the full energy peak efficiency (FEPE) for precise gamma spectrometry measurements of environmental samples with high-purity germanium (HPGe) detector, valid when this efficiency depends on the energy of the radiation E, the height of the cylindrical sample H, and its density ρ, is introduced. The methodology consists of an initial calibration as a function of E and H and the application of a self-attenuation factor, depending on the density of the sample ρ, in order to correct for the different attenuation of the generic sample in relation to the measured standard. The obtained efficiency can be used in the whole range of interest studied, E = 120–2000 keV, H = 1–5 cm, and ρ = 0.8–1.7 g/cm3, being its uncertainty below 5%. The efficiency has been checked by the measurement of standards, resulting in a good agreement between experimental and expected activities. The described methodology can be extended to similar situations when samples show geometric and compaction differences. |
| topic |
efficiency calibration environmental radioactivity gamma spectrometry geometric dependence of the efficiency self-attenuation corrections |
| url |
https://doi.org/10.1515/nuka-2017-0007 |
| work_keys_str_mv |
AT barreramanuel precisedeterminationofhpgedetectorefficiencyforgammaspectrometrymeasurementsofenvironmentalsampleswithvariablegeometryanddensity AT casasruizmelquiades precisedeterminationofhpgedetectorefficiencyforgammaspectrometrymeasurementsofenvironmentalsampleswithvariablegeometryanddensity AT alonsojosej precisedeterminationofhpgedetectorefficiencyforgammaspectrometrymeasurementsofenvironmentalsampleswithvariablegeometryanddensity AT vidaljuan precisedeterminationofhpgedetectorefficiencyforgammaspectrometrymeasurementsofenvironmentalsampleswithvariablegeometryanddensity |
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