| Autor: |
Akira Iwahara, R. Poledna, Carlos José da Silva, Estela Maria de Oliveira, Regio dos Santos Gomes, José Ubiratan Delgado, Paulo Alberto Lima da Cruz, Ricardo Tadeu Lopes |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Brazilian Journal of Radiation Sciences. 7 |
| ISSN: |
2319-0612 |
| Popis: |
A 68(Ge+Ga) commercial solution has been standardized in LNMRI in Brazil, by sum-peak method, in which a 3”x3” NaI(Tl) gamma-ray detector is positioned at the top of a well-type 5”x5” NaI(Tl) gamma-ray detector, resulting in a set up approximately 4p geometry. In this work the known germanium volatility was tested using three dried sources and three liquid sources in the sum-peak method measurements and the activity results showed a standard deviation of 0.41%. The activities were compared with another primary method: 4pb-g live-timed anti-coincidence counting. The two methods gave activity concentration values with differences from the certified value of +0.8 % (anticoincidence method) and -3.4% (sum-peak method). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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