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The development of an alpha / beta separation liquid scintillation cocktail for aqueous samples.

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>08/1993
<mark>Journal</mark>Journal of Radioanalytical and Nuclear Chemistry
Issue number2
Number of pages8
Pages (from-to)341-348
<mark>Original language</mark>English


Scintillation cocktail components were studied with regard to their impact on pulse decay discimination (PDD) and hence the separation of alpha from beta activity, using a Packard 2250 CA alpha/beta. Di-isopropyl naphthalene (DIN) was found to be the most suitable solvent, both from safety considerations and also the fact that it acts in a very similar manner to naphthalene in stretching the pulses produced at the photomultiplier tube anode and hence enhancing the separation. Increasing the surfactant concentration and the use of dimethylanthracene (DMA) as secondary fluor degraded the cocktail's performance. PMT anode pulse shapes were found to be a useful indicator of PDD efficiency but could not give a quantitative guide.