Validation of the stamping method for CaSO4:RE + Teflon® pellets production
The IPEN method for the CaSO4:RE + Teflon® production, developed and patented at the Dosimetric Materials Laboratory – LMD/IPEN in the earlier 1980’s, [1] is highly time-demanding, so that the use of the stamping method, already widely industrially applied, would enhance the CaSO4:RE + Teflon® pelle...
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| Format: | Article |
| Language: | English |
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Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)
2015-05-01
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| Series: | Brazilian Journal of Radiation Sciences |
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| Online Access: | https://bjrs.org.br/revista/index.php/REVISTA/article/view/170 |
| _version_ | 1817978161436033024 |
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| author | Maira Goes Nunes Leticia Lucente Campos |
| author_facet | Maira Goes Nunes Leticia Lucente Campos |
| author_sort | Maira Goes Nunes |
| collection | DOAJ |
| description | The IPEN method for the CaSO4:RE + Teflon® production, developed and patented at the Dosimetric Materials Laboratory – LMD/IPEN in the earlier 1980’s, [1] is highly time-demanding, so that the use of the stamping method, already widely industrially applied, would enhance the CaSO4:RE + Teflon® pellets production. Thus, validating the stamping method, by comparing the dosimetric properties of a batch of pellets produced by each method, became a must. The stamped batch presents the same mean non-irradiated signals either after sintering or annealing while IPEN batch mean non-irradiated signals vary in 23%. The mean TL signal after irradiation was about 50 nC, but the standard deviation varies from 20% to 33% for IPEN batch and keeps in 10% for the stamped batch. 24 h after the irradiation, the TL signal decreased to about 35 nC, with no differences in IPEN batch standard deviation and a decrease to 5% in stamped batch standard deviation, for the five performed essays. Calibration curves present a linear behavior over the entire studied dose range and the same coefficients for both methods, however, the uncertainties in the coefficients determined to the calibration curve obtained with stamped pellets are significantly smaller, leading to a more precise dose determination. This results show that the stamping method produces more homogeneous batches, with pellets that maintain the dosimetric characteristics of the detectors produced by IPEN method, in such a way that the stamping method can substitute with advantages the IPEN method in the CaSO4:RE + Teflon® dosimetric pellets production.
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| first_indexed | 2024-04-13T22:25:42Z |
| format | Article |
| id | doaj.art-362804fab66f425ba039683c5fc13c23 |
| institution | Directory Open Access Journal |
| issn | 2319-0612 |
| language | English |
| last_indexed | 2024-04-13T22:25:42Z |
| publishDate | 2015-05-01 |
| publisher | Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR) |
| record_format | Article |
| series | Brazilian Journal of Radiation Sciences |
| spelling | doaj.art-362804fab66f425ba039683c5fc13c232022-12-22T02:27:04ZengBrazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)Brazilian Journal of Radiation Sciences2319-06122015-05-0131A10.15392/bjrs.v3i1A.170Validation of the stamping method for CaSO4:RE + Teflon® pellets productionMaira Goes Nunes0Leticia Lucente Campos1Instituto de Pesquisas Energéticas e NuclearesInstituto de Pesquisas Energéticas e NuclearesThe IPEN method for the CaSO4:RE + Teflon® production, developed and patented at the Dosimetric Materials Laboratory – LMD/IPEN in the earlier 1980’s, [1] is highly time-demanding, so that the use of the stamping method, already widely industrially applied, would enhance the CaSO4:RE + Teflon® pellets production. Thus, validating the stamping method, by comparing the dosimetric properties of a batch of pellets produced by each method, became a must. The stamped batch presents the same mean non-irradiated signals either after sintering or annealing while IPEN batch mean non-irradiated signals vary in 23%. The mean TL signal after irradiation was about 50 nC, but the standard deviation varies from 20% to 33% for IPEN batch and keeps in 10% for the stamped batch. 24 h after the irradiation, the TL signal decreased to about 35 nC, with no differences in IPEN batch standard deviation and a decrease to 5% in stamped batch standard deviation, for the five performed essays. Calibration curves present a linear behavior over the entire studied dose range and the same coefficients for both methods, however, the uncertainties in the coefficients determined to the calibration curve obtained with stamped pellets are significantly smaller, leading to a more precise dose determination. This results show that the stamping method produces more homogeneous batches, with pellets that maintain the dosimetric characteristics of the detectors produced by IPEN method, in such a way that the stamping method can substitute with advantages the IPEN method in the CaSO4:RE + Teflon® dosimetric pellets production. https://bjrs.org.br/revista/index.php/REVISTA/article/view/170Thermoluminescent DosimeterThermoluminescent DosimetryRadiometry. |
| spellingShingle | Maira Goes Nunes Leticia Lucente Campos Validation of the stamping method for CaSO4:RE + Teflon® pellets production Brazilian Journal of Radiation Sciences Thermoluminescent Dosimeter Thermoluminescent Dosimetry Radiometry. |
| title | Validation of the stamping method for CaSO4:RE + Teflon® pellets production |
| title_full | Validation of the stamping method for CaSO4:RE + Teflon® pellets production |
| title_fullStr | Validation of the stamping method for CaSO4:RE + Teflon® pellets production |
| title_full_unstemmed | Validation of the stamping method for CaSO4:RE + Teflon® pellets production |
| title_short | Validation of the stamping method for CaSO4:RE + Teflon® pellets production |
| title_sort | validation of the stamping method for caso4 re teflon r pellets production |
| topic | Thermoluminescent Dosimeter Thermoluminescent Dosimetry Radiometry. |
| url | https://bjrs.org.br/revista/index.php/REVISTA/article/view/170 |
| work_keys_str_mv | AT mairagoesnunes validationofthestampingmethodforcaso4reteflonpelletsproduction AT leticialucentecampos validationofthestampingmethodforcaso4reteflonpelletsproduction |