Abstract

In order to enhance the resolution in a liquid scintillation with pulse shape discrimination for the measurement of actinide at low level, a study of two scintillating cocktails (Alphaex™ and Ultima Gold LLT™) and two alpha liquid scintillation spectrometers, (PERALS™ and TRI-CARB™) was undertaken. The criteria which can be applied to improve the resolution are the use of no-water miscible cocktail, the optimisation of energy transfer through the knowledge of the spectroscopic data, the employ of P.M. with higher quantum efficiency, scintillators with low Stoke's shift and high fluorescence quantum yield and the use of vial with low optical path.

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