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An Evaluation of Shielding Characteristics Applicable to Mini-Gas Proportional-Counter-Based 14C Dating Systems

Published online by Cambridge University Press:  18 July 2016

Lauri Kaihola ,
Hannu Kojola ,
Henry Polach ,
Erkki Soini  and
Robert Otlet
Lauri Kaihola
Affiliation:
University of Turku, Department of Physical Sciences, Turku, Finland
Hannu Kojola
Affiliation:
Wallac Oy, Research Department, Turku, Finland
Henry Polach
Affiliation:
Radiocarbon Dating Research, Australian National University, Canberra
Erkki Soini
Affiliation:
Wallac Oy, Research Department, Turku, Finland
Robert Otlet
Affiliation:
Low Level Measurement Laboratory, AERE, Harwell, UK
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Abstract

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A mini-gas-proportional counter prototype of 10ml capacity (at NTP) was constructed of oxygen-free Finnish copper. The counter tube will be one of 16 equivalent tubes of a small-sample gas counting system, which is equipped with passive graded shield made of lead, cadmium, and copper and a dual active anticoincidence shield, consisting of an external cosmic gas-proportional and an internal plastic scintillation guard. The aim of this study was to evaluate the parameters leading to the design of a cost-effective and compact shielding package for mini-counters.

Information

Type
V. General Aspects of 14C Technique
Information
Radiocarbon , Volume 25 , Issue 2: 11th International Radiocarbon Conference , 1983 , pp. 577 - 580
Copyright
Copyright © The American Journal of Science 

References

Currie, LA, Gerlach, RW, Klouda, GA, Ruegg, FC, and Tompkins, GB, 1983, Miniature signals and miniature counters: Accuracy assurance via microprocessors and multiparameter control techniques, in Stuiver, M and Kra, RS, eds, Internatl 14C conf, 11th, Proc: Radiocarbon, v 25.Google Scholar
Harbottle, G, Sayre, EV, and Stoenner, RW, 1979, Carbon-14 dating of small samples by proportional counting: Science, v 206, p 683–685.CrossRefGoogle ScholarPubMed
Otlet, RL, Huxtable, G, Evans, GV, Humphreys, DG, Short, TD, and Conchie, SJ, 1983, Development and applications of the Harwell small counter facility for the measurement of 14C in very small samples, in : Radiocarbon, v 25.CrossRefGoogle Scholar
Polach, H, Soini, E, Kojola, H, Robertson, S, and Kaihola, L, 1982, Radiocarbon dating of milligram-size samples using gas proportional counters: an evaluation of precision and of design parameters, in Ambrose, W and Duerden, P, eds, Archaeometry: An Australasian perspective: Canberra, ANU Press, p 343–350.Google Scholar
Soini, E, and Kojola, H, 1977, An automatic gas counter for quantitative microdetermination of tritium in biological material: Acta Pharmacol Toxicol, v 41, p 79.Google Scholar