Radiological Dating Laboratory, the Norwegian Institute Several
Trondheim Natural Radiocarbon Measurements VIII Item Type Article; text Authors Gulliksen, Steinar; Nydal, Reidar; Skogseth, Fred Citation Gulliksen, S., Nydal, R., & Skogseth, F. (1978). Trondheim natural radiocarbon measurements VIII. Radiocarbon, 20(1), 105-133. DOI 10.1017/S0033822200003933 Publisher American Journal of Science Journal Radiocarbon Rights Copyright © The American Journal of Science Download date 02/10/2021 14:34:07 Item License http://rightsstatements.org/vocab/InC/1.0/ Version Final published version Link to Item http://hdl.handle.net/10150/652510 [RADIOCARBON, VOL. 20, No. 1, 1978, P. 105-133] TRONDHEIM NATURAL RADIOCARBON MEASUREMENTS VIII STEINAR GULLIKSEN, REIDAR NYDAL, and FRED SKOGSETH Radiological Dating Laboratory, The Norwegian Institute of Technology, The University of Trondheim, Norway INTRODUCTION Most dates in this list were obtained between 1972 and 1976. Treat- ment of samples has remained essentially the same as described previously (R, 1975, p 364). Several experiments concerning shielding and counter background have been performed (Nydal et al, 1975; Gulliksen Nydal, 1976). The capacity of our iron shield has been doubled from three to six chambers, two new guard counters, GM4 and GM5, have been installed, and three new counters, nos. 7, 8 and 9, added to the three already operating. Data for the counters with present shielding are: Counter Effective vol standard no. (L) (cpm) net count (cpm) 2 1.5 0.70 5 0.9 0.90 6 0.6 0.45 7 1.2 0.70 8 0.36 0.28 9 1.6 0.75 Counter 9 is used for both tritium and 14C measurements. The back- grounds appearing in the table are not the lowest values obtained during shielding experiments.
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