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La Jolla Natural Radiocarbon Measurements III∗

Published online by Cambridge University Press:  18 July 2016

Carl L. Hubbs ,
George S. Bien  and
Hans E. Suess
Carl L. Hubbs
Affiliation:
University of California, San Diego
George S. Bien
Affiliation:
University of California, San Diego
Hans E. Suess
Affiliation:
University of California, San Diego
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During 1962 the La Jolla Radiocarbon Laboratory continued to follow essentially the same technique as in previous years. Three counters were used:

  1. 1. The “Bern Counter,” an Oeschger-Houtermans instrument manufactured at the Physical Institute of the University of Bern; described in La Jolla I (p. 197).

  2. 2. The “Brussels Counter,” another Oeschger-Houtermans instrument, manufactured in Brussels by Manufacture Belge de Campes et de Matériel Électronique, S. A.; characterized in La Jolla II (p. 204).

  3. 3. The “400-cc La Jolla Counter,” recently constructed at the University of California, San Diego to facilitate the age determination of samples containing less than 1 g of carbon. Because the first model, now in use, was constructed of brass—not the optimal material—the background count is relatively high (ca. 5.0 counts/min). Advantages lie in its high stability. For samples that yield 0.5 L or more of acetylene, this counter can be used quite satisfactorily. Check runs, using the same sample in this counter and in the Bern and Brussels counters, agree closely.

Type
Research Article
Information
Radiocarbon , Volume 5 , 1963 , pp. 254 - 272
Copyright
Copyright © The American Journal of Science 

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