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Activity standardisation of 161Tb
- Source :
- Applied Radiation and Isotopes. 166:109411
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- 161Tb, which emits low-energy β−- and γ-particles in addition to conversion and Auger electrons, has aroused increased interest for medical imaging and therapy. To support the use of this radionuclide, a161Tb solution was standardised using the β-γ coincidence technique, as well as the TDCR method. The solution had 4.5·10−3% of 160Tb impurities. Primary coincidence measurements, with plastic or liquid scintillators for beta detection, were carried out using both analogue and digital electronics. TDCR measurements using defocusing, grey filtering and quenching for varying the efficiency were also made. Monte Carlo calculations were used to compute the detection efficiency. The coincidence measurements with analogue electronics and the TDCR show a good consistency, and are compatible with the digital coincidence results within uncertainties. An ampoule of this solution was submitted to the BIPM as a contribution to the international reference system.
- Subjects :
- Quenching
Digital electronics
Radiation
Materials science
Auger effect
Analogue electronics
business.industry
Liquid scintillation counting
Monte Carlo method
Scintillator
010403 inorganic & nuclear chemistry
01 natural sciences
Coincidence
030218 nuclear medicine & medical imaging
0104 chemical sciences
Computational physics
03 medical and health sciences
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0302 clinical medicine
symbols
business
Subjects
Details
- ISSN :
- 09698043
- Volume :
- 166
- Database :
- OpenAIRE
- Journal :
- Applied Radiation and Isotopes
- Accession number :
- edsair.doi...........34b89888308c4209be04907f3fa0ed95