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Optimization of Liquid Scintillation Counting Conditions With Two Kinds of Vials and Detector Shields for Low-Activity Radiocarbon Measurements

Published online by Cambridge University Press:  18 July 2016

Gemma Rauret ,
J S Mestres  and
J F Garcia
Gemma Rauret
Affiliation:
Radiocarbon Laboratory, Department of Analytical Chemistry University of Barcelona – Institute of Catalan Studies, Barcelona, Spain
J S Mestres
Affiliation:
Radiocarbon Laboratory, Department of Analytical Chemistry University of Barcelona – Institute of Catalan Studies, Barcelona, Spain
J F Garcia
Affiliation:
Radiocarbon Laboratory, Department of Analytical Chemistry University of Barcelona – Institute of Catalan Studies, Barcelona, Spain
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Abstract

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Low-level radiocarbon measurements were made using two liquid scintillation (LS) counters, both with passive lead shields of approximately the same dimensions. The first one had a conventional background reduction with low-activity lead and “high-low” coincidence bias selection, and the second one had a spectrum analysis background reduction based on the different three-dimensional pulse-height signal of background and beta pulses.

The performance of commercial teflon-copper and glass vials were compared with both LS counters. Optimum counting conditions for the two detectors studied were also established. From results obtained, quality parameters and characteristics of quench curves were studied. Performances of each counter in the working conditions established were also compared.

Type
I. Sample Preparation and Measurement Techniques
Information
Radiocarbon , Volume 31 , Issue 3: June 20-25, 1988 Dubrovnik, Yugoslavia , 1989 , pp. 380 - 386
Copyright
Copyright © The American Journal of Science 

References

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