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Scintillation Cocktail Optimization for 14C Dating Using the Packard 2000CA/LL and 2260XL

Published online by Cambridge University Press:  18 July 2016

Robert Anderson  and
G T Cook
Robert Anderson
Affiliation:
Glasgow University Radiocarbon Dating Laboratory Scottish Universities Research & Reactor Centre, East Kilbride, Glasgow G75 0QU, Scotland
G T Cook
Affiliation:
Glasgow University Radiocarbon Dating Laboratory Scottish Universities Research & Reactor Centre, East Kilbride, Glasgow G75 0QU, Scotland
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Abstract

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In terms of both quenching and, in particular, counting efficiency, scintillation counters employing burst counting circuitry are sensitive to changes in scintillant concentration. Our research demonstrates that there are plateau regions where neither parameter is significantly influenced by moderate changes in a cocktail containing butyl - PBD and bis - MSB. One of these, consisting of butyl - PBD 2.8mg.g-1 and bis - MSB 3mg.g-1 of benzene is recommended for these counters, as it enables open window counting efficiencies of ca 90% while exhibiting optimal resistance to quenching. A method for accurate dispensing of such small weights is also described.

Type
Articles
Information
Radiocarbon , Volume 33 , Issue 1 , 1991 , pp. 1 - 7
Copyright
Copyright © The American Journal of Science 

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