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On the stability of 3H and 63Ni Ultima Gold liquid scintillation sources
- Source :
- Applied Radiation and Isotopes. 118:25-31
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- The stability of 3H and 63Ni samples, made with Ultima Gold and Ultima Gold AB using eight aqueous fractions ranging between 0.1% and 10%, was monitored over a period of 32 weeks. Counting rate losses were measured in all cases, but were found to be particularly severe for samples with low aqueous fractions. Hydrodynamic diameter measurements of the reverse micelles of 3H and 63Ni in Ultima Gold and Ultima Gold AB samples were performed with dynamic light scattering. For Ultima Gold, the micelle diameters were measured to be about 2nm and slightly dependent of the aqueous fraction, while for Ultima Gold AB they were found to vary strongly with the aqueous fraction and range between 1 and 4nm. The hypothesis that the counting rate instabilities derive from changes in the sizes of micelles was tested by measuring them four times over the monitoring period. The measurement results do not support this claim.
- Subjects :
- Radiation
Aqueous solution
Ultima
Chemistry
Liquid scintillation counting
Analytical chemistry
Fraction (chemistry)
010403 inorganic & nuclear chemistry
01 natural sciences
Micelle
030218 nuclear medicine & medical imaging
0104 chemical sciences
03 medical and health sciences
0302 clinical medicine
Dynamic light scattering
Counting rate
Subjects
Details
- ISSN :
- 09698043
- Volume :
- 118
- Database :
- OpenAIRE
- Journal :
- Applied Radiation and Isotopes
- Accession number :
- edsair.doi...........7af6c798440dae0952e7a976115029cc