Uncertainty assessment of measurement of Cs-137 in water using gamma spectrometry method
A useful benchmark for the reliability of gamma spectrometry results is to provide measurement uncertainty. Due to the importance and necessity of radiation monitoring in water resources, this research has been oriented toward providing measurements of the gamma- emitting radionuclides along with in...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | fas |
| Published: |
Nuclear Science and Technology Research Institute
2020-02-01
|
| Series: | مجله علوم و فنون هسته‌ای |
| Subjects: | |
| Online Access: | https://jonsat.nstri.ir/article_1068_db9e315f067f55e38fb63c931e593781.pdf |
| _version_ | 1797835177360097280 |
|---|---|
| author | H Ranjbar A Yousefi |
| author_facet | H Ranjbar A Yousefi |
| author_sort | H Ranjbar |
| collection | DOAJ |
| description | A useful benchmark for the reliability of gamma spectrometry results is to provide measurement uncertainty. Due to the importance and necessity of radiation monitoring in water resources, this research has been oriented toward providing measurements of the gamma- emitting radionuclides along with introducing the expression for the uncertainty that appeared in these measurements. To calculate the uncertainty of the activity measurements in water, a sample, where its radioactive elements were obtained from the PolAtom Company, was used. The calculations were performed based on the 661 keV peak of 137Cs radionuclide and a high-purity germanium detector (HPGe). The investigations show that the factors affecting the measurement uncertainty are composed of two parts, including counting with the gamma spectroscopy system and sample preparation, where each of these parts comes from several sources of uncertainty such as uncertainties associated with the counting process, efficiency calibration, emission probability, the counting correction factors, and the mass measurement. The results of analyses show that the relative uncertainty is about 3.7% (Coverage factor = 1) for a water sample with an activity of 425 Becquerel from 137Cs. |
| first_indexed | 2024-04-09T14:49:02Z |
| format | Article |
| id | doaj.art-93ee1d6be679419c8249f4406e1986fc |
| institution | Directory Open Access Journal |
| issn | 1735-1871 2676-5861 |
| language | fas |
| last_indexed | 2024-04-09T14:49:02Z |
| publishDate | 2020-02-01 |
| publisher | Nuclear Science and Technology Research Institute |
| record_format | Article |
| series | مجله علوم و فنون هسته‌ای |
| spelling | doaj.art-93ee1d6be679419c8249f4406e1986fc2023-05-02T10:15:41ZfasNuclear Science and Technology Research Instituteمجله علوم و فنون هسته‌ای1735-18712676-58612020-02-01404374210.24200/nst.2020.10681068Uncertainty assessment of measurement of Cs-137 in water using gamma spectrometry methodH Ranjbar0A Yousefi1پژوهشکده‌ی مواد و سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران ـ ایرانپژوهشکده‌ی مواد و سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران ـ ایرانA useful benchmark for the reliability of gamma spectrometry results is to provide measurement uncertainty. Due to the importance and necessity of radiation monitoring in water resources, this research has been oriented toward providing measurements of the gamma- emitting radionuclides along with introducing the expression for the uncertainty that appeared in these measurements. To calculate the uncertainty of the activity measurements in water, a sample, where its radioactive elements were obtained from the PolAtom Company, was used. The calculations were performed based on the 661 keV peak of 137Cs radionuclide and a high-purity germanium detector (HPGe). The investigations show that the factors affecting the measurement uncertainty are composed of two parts, including counting with the gamma spectroscopy system and sample preparation, where each of these parts comes from several sources of uncertainty such as uncertainties associated with the counting process, efficiency calibration, emission probability, the counting correction factors, and the mass measurement. The results of analyses show that the relative uncertainty is about 3.7% (Coverage factor = 1) for a water sample with an activity of 425 Becquerel from 137Cs.https://jonsat.nstri.ir/article_1068_db9e315f067f55e38fb63c931e593781.pdfuncertaintygamma spectroscopyenvironmental monitoring137cs |
| spellingShingle | H Ranjbar A Yousefi Uncertainty assessment of measurement of Cs-137 in water using gamma spectrometry method مجله علوم و فنون هسته‌ای uncertainty gamma spectroscopy environmental monitoring 137cs |
| title | Uncertainty assessment of measurement of Cs-137 in water using
gamma spectrometry method |
| title_full | Uncertainty assessment of measurement of Cs-137 in water using
gamma spectrometry method |
| title_fullStr | Uncertainty assessment of measurement of Cs-137 in water using
gamma spectrometry method |
| title_full_unstemmed | Uncertainty assessment of measurement of Cs-137 in water using
gamma spectrometry method |
| title_short | Uncertainty assessment of measurement of Cs-137 in water using
gamma spectrometry method |
| title_sort | uncertainty assessment of measurement of cs 137 in water using gamma spectrometry method |
| topic | uncertainty gamma spectroscopy environmental monitoring 137cs |
| url | https://jonsat.nstri.ir/article_1068_db9e315f067f55e38fb63c931e593781.pdf |
| work_keys_str_mv | AT hranjbar uncertaintyassessmentofmeasurementofcs137inwaterusinggammaspectrometrymethod AT ayousefi uncertaintyassessmentofmeasurementofcs137inwaterusinggammaspectrometrymethod |