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Comparison and improvement of the determinations of actinide low activities using several alpha liquid scintillation spectrometers

Abstract : We applied three procedures using two or liquid scintillation spectrometers (PERALS and TRI-CARB) and two scintillation cocktails (Alphaex and Ultima Gold LLT) for the determination of a-emitter low activities. For each procedure, the limit of detection, the resolution, the separation factor, and the Fischer coefficient were determined in order to perform U-232-U-234-U-238 isotopic measurements. The deconvolution usually performed is clean when the PERALS spectrometer is used. This is not possible for the TRI-CARB spectrometer using the Ultima Gold LLT scintillation cocktail. This problem was solved by combining the advantages of both techniques using the Alphaex scintillation cocktail in the TRI-CARB spectrometer, Under these conditions, the limit of detection was improved, the resolution decreased from 500-800 to 420-590 keV, and the separation factor increased from 0.9 to 1.1-1.2. This third procedure was applied with success for U-232-U-234-U-238 isotopic experiments.
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http://hal.in2p3.fr/in2p3-00006032
Contributor : Suzanne Robert Connect in order to contact the contributor
Submitted on : Monday, September 11, 2000 - 4:45:53 PM
Last modification on : Wednesday, October 14, 2020 - 3:46:07 AM

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  • HAL Id : in2p3-00006032, version 1

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N. Dacheux, J. Aupiais, O. Courson, C. Aubert. Comparison and improvement of the determinations of actinide low activities using several alpha liquid scintillation spectrometers. Analytical Chemistry, American Chemical Society, 2000, 72, pp.3150-3157. ⟨in2p3-00006032⟩

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