Hostname: page-component-77c89778f8-vsgnj Total loading time: 0 Render date: 2024-07-16T15:03:51.889Z Has data issue: false hasContentIssue false
  • English
  • Français

Background Measurements with Different Shielding and Anticoincidence Systems

Published online by Cambridge University Press:  18 July 2016

H H Loosli ,
Markus Forster  and
R L Otlet
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.

Extremely low background count rates are a necessary condition for both the measurement of 39Ar concentrations in ground and ocean water and of 14C activities in small samples using gas proportional counting techniques. A systematic comparison of the performance of three different designs of shielding systems in four different installations has been made.

Background values of selected gas proportional counters were measured, compared and separated into their various components. Acceptably low backgrounds were obtained in all the systems tried. The performance of a NaI shield in a surface laboratory was found to be at least equal to the best obtained with a gas anticoincidence detector in a deep underground laboratory.

Type
V. Conventional Techniques
Information
Radiocarbon , Volume 28 , Issue 2A , 1986 , pp. 615 - 622
Copyright
Copyright © The American Journal of Science 

References

Andrews, J W, Balderer, W, Bath, A H, Clausen, H B, Evans, G V, Florkowski, T, Goldbrunner, J E, Ivanovich, M, Loosli, H H and Zojer, H, 1984, Environmental isotope studies in two aquifer systems: A comparison of groundwater dating methods, in Isotope hydrology, Proc: Vienna, IAEA, p 535–576.Google Scholar
Forster, M, Moser, H and Loosli, H H, 1984, Isotope hydrological study with Carbon-14 and Argon-39 in the Bunter sandstones of the Saar region, in Isotope hydrology, Proc: Vienna, IAEA, p 515–533.Google Scholar
Loosli, H H, 1983, A dating method with 39Ar: Earth Planetary Sci Letters, v 63, p 51–62.CrossRefGoogle Scholar
Loosli, H H, Heimann, M and Oeschger, H, 1980, Low level gas proportional counting in an underground laboratory, in Stuiver, M and Kra, R S, eds, Internatl 14C conf, 10th, Proc: Radiocarbon, v 22, no. 2, p 461–470.Google Scholar
Oeschger, H, Beer, J, Loosli, H H and Schotterer, U, 1981, Low level counting systems in deep underground laboratories, in Methods of low-level counting and spectrometry, Proc: Vienna, IAEA, p 459–474.Google Scholar
Otlet, R L, Huxtable, G and Sanderson, D C W, 1986, The development of practical systems for 14C measurement in small samples using miniature counters, in Stuiver, M and Kra, R S, eds, Internatl 14C conf, 12th, Proc: Radiocarbon, this issue.Google Scholar
Sayre, E V, Harbottle, G, Stoenner, R W, Otlet, R L and Evans, G V, 1981, Small gas proportional counters for the 14C measurement of very small samples, in Methods of low-level counting and spectrometry, Proc: Vienna, IAEA, p 393–407.Google Scholar
Schlitzer, R, Roether, W, Weidemann, U, Kalt, P and Loosli, H, 1985, A meridional 14C and 39Ar section in the North East Atlantic deep water: Jour Geophys Research, v 90, no. C 4, p 6945–6952.Google Scholar