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

被引:20
作者
Dacheux, N
Aupiais, J
Courson, O
Aubert, C
机构
[1] Univ Paris 11, Inst Nucl Phys, Grp Radiochim, F-91406 Orsay, France
[2] CEA, Serv Radioanalyses Chim Environm, Dept Analyse Surveillance Environm, F-91680 Bruyeres Le Chatel, France
关键词
D O I
10.1021/ac9914216
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
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.
引用
收藏
页码:3150 / 3157
页数:8
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