A new liquid scintillation counting technique to resolve mixtures of two pure beta-emitting radionuclides
Doctoral Thesis
2007
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University of Cape Town
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Abstract
Methods currently available for the accurate activity resolution of dual-label solutions of pure β-emitting radionuclides are mostly time consuming and involve much effort. The goal of this thesis was therefore to devise a simpler method to achieve the same objective. The technique developed is based on elements of two liquid scintillation counting techniques that are widely used to measure single-radionuclide solutions, namely the triple-to-double coincidence ratio (TDCR) efficiency calculation technique and the CIEMAT/NIST efficiency tracing method. Double- and triple-coincidence count rates, together with the figure-of-merit P determined from an external tracer, provide sufficient information to extract the component activities of a source in a simple manner.
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Van Wyngaardt, W. 2007. A new liquid scintillation counting technique to resolve mixtures of two pure beta-emitting radionuclides. University of Cape Town.