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Activity standardisation of 45Ca and 204Tl using the new TDCR system at CMI
J. Sochorová, P. Auerbach, Z. Dutka,
Language English Country England, Great Britain
Document type Journal Article
- MeSH
- Equipment Failure Analysis MeSH
- Radiation Dosage MeSH
- Equipment Design MeSH
- Internationality MeSH
- Half-Life MeSH
- Thallium Radioisotopes analysis standards MeSH
- Calcium Radioisotopes analysis standards MeSH
- Radiometry instrumentation standards MeSH
- Reference Values MeSH
- Reference Standards MeSH
- Publication type
- Journal Article MeSH
A new triple-to-double coincidence ratio (TDCR) system has been established at CMI as an additional technique for primary activity standardisation. Details of the detectors and the electronics are given. Construction of the optical chamber was validated using measurement of a (3)H standard-the efficiency achieved with Ultima Gold was 58%. Several methods of efficiency variation (coloured bands painted on vial, positioning and photomultipliers defocussing) are compared. Activity concentrations of (204)Tl and (45)Ca were determined with the TDCR method and with the efficiency tracer technique. Advantages of the TDCR method compared to the efficiency tracing method and agreement between results are shown.
References provided by Crossref.org
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