Development of 137Cs irradiation facility for metrological application
In this work, 137Cs irradiation facility at the National Institute of Standards (NIS) was developed to enhance the calibration processes. Different thickness lead sheets were used for beam attenuation, to enlarge the 137Cs dose range. Ambient dose equivalent rate, H*(10) was measured using two ioniz...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2017-01-01
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| Series: | International Journal of Metrology and Quality Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1051/ijmqe/2017011 |
| _version_ | 1819109420835012608 |
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| author | Hassan Mohamed A. Esmat Enas El-Sersy Ahmed R. |
| author_facet | Hassan Mohamed A. Esmat Enas El-Sersy Ahmed R. |
| author_sort | Hassan Mohamed A. |
| collection | DOAJ |
| description | In this work, 137Cs irradiation facility at the National Institute of Standards (NIS) was developed to enhance the calibration processes. Different thickness lead sheets were used for beam attenuation, to enlarge the 137Cs dose range. Ambient dose equivalent rate, H*(10) was measured using two ionization chambers at a different source-detector distances (SDDs) and a lead sheet thickness. The deviation from the inverse square law for the dose–SDD relationship was obtained. The beam flatness of unattenuated and the lead attenuated beam was measured. The attenuation coefficient for the used lead sheets was obtained and correlated to the broad beam geometry. The room scattering was studied in detail. The uncertainty of the measured doses was calculated. It was found that the inverse square law is verified well at SDD ≥ 2 m. The measured attenuation coefficient for lead attenuators is affected by the broad beam geometry. The contribution of the scattering component of the dose at a certain SDD is the major source of uncertainty since it extracted a value of 1.05%, while the combined uncertainty from all other factors affecting the dose measurements is 1.34%. |
| first_indexed | 2024-12-22T03:25:33Z |
| format | Article |
| id | doaj.art-84f10a901c5349fca9653015cfb1cf60 |
| institution | Directory Open Access Journal |
| issn | 2107-6847 |
| language | English |
| last_indexed | 2024-12-22T03:25:33Z |
| publishDate | 2017-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | International Journal of Metrology and Quality Engineering |
| spelling | doaj.art-84f10a901c5349fca9653015cfb1cf602022-12-21T18:40:36ZengEDP SciencesInternational Journal of Metrology and Quality Engineering2107-68472017-01-0182010.1051/ijmqe/2017011ijmqe160061Development of 137Cs irradiation facility for metrological applicationHassan Mohamed A.Esmat EnasEl-Sersy Ahmed R.In this work, 137Cs irradiation facility at the National Institute of Standards (NIS) was developed to enhance the calibration processes. Different thickness lead sheets were used for beam attenuation, to enlarge the 137Cs dose range. Ambient dose equivalent rate, H*(10) was measured using two ionization chambers at a different source-detector distances (SDDs) and a lead sheet thickness. The deviation from the inverse square law for the dose–SDD relationship was obtained. The beam flatness of unattenuated and the lead attenuated beam was measured. The attenuation coefficient for the used lead sheets was obtained and correlated to the broad beam geometry. The room scattering was studied in detail. The uncertainty of the measured doses was calculated. It was found that the inverse square law is verified well at SDD ≥ 2 m. The measured attenuation coefficient for lead attenuators is affected by the broad beam geometry. The contribution of the scattering component of the dose at a certain SDD is the major source of uncertainty since it extracted a value of 1.05%, while the combined uncertainty from all other factors affecting the dose measurements is 1.34%.https://doi.org/10.1051/ijmqe/2017011ionizing radiationradiation protectionCs-137scatteringirradiation facility |
| spellingShingle | Hassan Mohamed A. Esmat Enas El-Sersy Ahmed R. Development of 137Cs irradiation facility for metrological application International Journal of Metrology and Quality Engineering ionizing radiation radiation protection Cs-137 scattering irradiation facility |
| title | Development of 137Cs irradiation facility for metrological application |
| title_full | Development of 137Cs irradiation facility for metrological application |
| title_fullStr | Development of 137Cs irradiation facility for metrological application |
| title_full_unstemmed | Development of 137Cs irradiation facility for metrological application |
| title_short | Development of 137Cs irradiation facility for metrological application |
| title_sort | development of 137cs irradiation facility for metrological application |
| topic | ionizing radiation radiation protection Cs-137 scattering irradiation facility |
| url | https://doi.org/10.1051/ijmqe/2017011 |
| work_keys_str_mv | AT hassanmohameda developmentof137csirradiationfacilityformetrologicalapplication AT esmatenas developmentof137csirradiationfacilityformetrologicalapplication AT elsersyahmedr developmentof137csirradiationfacilityformetrologicalapplication |