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Miami Natural Radiocarbon Measurements I∗

Published online by Cambridge University Press:  18 July 2016

H. Göte Östlund ,
Albert L. Bowman  and
Gene A. Rusnak
H. Göte Östlund
Affiliation:
Institute of Marine Science, University of Miami, Florida; and Radioactive Dating Laboratory, Frescati, Stockholm 50, Sweden
Albert L. Bowman
Affiliation:
Institute of Marine Science, University of Miami, Florida; and Radioactive Dating Laboratory, Frescati, Stockholm 50, Sweden
Gene A. Rusnak
Affiliation:
Institute of Marine Science, University of Miami, Florida; and Radioactive Dating Laboratory, Frescati, Stockholm 50, Sweden
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The construction of the dating apparatus started in the summer of 1960 and was completed one year later. The laboratory is located on the bottom floor of a three-story concrete-block building which has two thin concrete floors on concrete beams above the shield. The building is underlain by carbonate mud and coral rock. The geographic location is 25° 43.9′ N Lat, 80° 09.8′ W Long and only a few feet above sealevel. We use a proportional-counting tube with an active volume of 1 L, and a total sample volume of 1.30 L, filled with purified CO2 to a pressure of 225 cm Hg (3 atm) at 25°C. The tube is made of copper with brass ends and quartz insulators. The shielding consists of 20 cm of iron, 10 cm of paraffin with boric acid, 2.5 cm of selected lead (Östlund, 1961), and cosmic ray guard counters. The room is air-conditioned but no additional precautions have been taken to exclude outdoor dust.

Type
Research Article
Information
Radiocarbon , Volume 4 , 1962 , pp. 51 - 56
Copyright
Copyright © The American Journal of Science 

References

Broecker, W. S., and Olson, E. A., 1961, Lamont radiocarbon measurements VIII: Radiocarbon, v. 3, p. 176–204.CrossRefGoogle Scholar
Fonselius, S., and Östlund, H. G., 1959, Natural radiocarbon measurements on surface waters from the North Atlantic and the Arctic Sea: Tellus, v. 11, p. 77–82.CrossRefGoogle Scholar
Östlund, H. G., 1957, Carbon dioxide proportional counting for natural radiocarbon measurements: Arkiv f. Kemi, v. 12, no. 6, p. 69–78.Google Scholar
Östlund, H. G. 1962, A hydrogen gas counting system for natural tritium measurements: Conf. on Tritium, Vienna, May 1961, Internat. Atomic Energy Agency Proc. Paper no. TTS/17.Google Scholar