Hostname: page-component-745bb68f8f-v2bm5 Total loading time: 0 Render date: 2025-01-08T04:50:37.910Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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 

References

Birks, JB 1975 In solutes and solvents for liquid scintillation counting. Koch-Light Publication.Google Scholar
Cook, GT, Anderson, R, Harkness, DD and Naysmith, P (ms) 1989 The optimisation of scintillation counters employing burst counting circuitry. Paper presented at Internatl conf on new trends in liquid scintillation counting and organic scintillators, 2-5 Oct, 1989, Gatlinburg, Tennessee.Google Scholar
Cook, GT, Harkness, DD and Anderson, R 1989 Performance of the Packard 2000CA/LL and 2250CA/XL liquid scintillation counters for 14C dating. In Long, A and Kra, RS, eds, Internatl 14C conf, 13th, Proc. Radiocarbon 31(3): 352–358.Google Scholar
Cook, GT, Naysmith, P, Anderson, R and Harkness, DD 1990 Performance optimisation of the Packard 2000CA/LL liquid scintillation counter for 14C dating. Nuclear Geophysics 4(2): 241–245.Google Scholar
Kaihola, L (ms) 1989 Liquid scintillation counting performance using glass vials in the Wallac 1220 Quantulus™. Paper presented at Internatl conf on new trends in liquid scintillation counting and organic scintillators, 2-5 Oct, 1989, Gatlinburg, Tennessee.Google Scholar
Noakes, JE, de Filippis, SJ and Valenta, RJ 1988 Low background liquid scintillation counting using an active sample holder and pulse discrimination electronics. In Internatl seminar for liquid scintillation analysis. Tokyo, Packard Japan KK: 5–42.Google Scholar
Polach, H, Calf, G, Harkness, DD, Hogg, A, Kaihola, L and Robertson, S 1988 Performance of new technology liquid scintillation counters for 14C dating. Nuclear Geophysics 2(2): 75–79.Google Scholar
Valenta, RJ 1986, Patent. Reduced background scintillation counting. US Patent No. 4, 651, 006.Google Scholar