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National Taiwan University Radiocarbon Measurements I

Published online by Cambridge University Press:  18 July 2016

Yuin-Chi Hsu
Affiliation:
Department of Physics, National Taiwan University, Taipei, Taiwan, China
Chia-Yi Huang
Affiliation:
Department of Physics, National Taiwan University, Taipei, Taiwan, China
Shih-Chong Lu
Affiliation:
Department of Physics, National Taiwan University, Taipei, Taiwan, China
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Natural C14 measurements have been performed at the Dept. of Physics, National Taiwan University since 1965, using a cylindrical proportional counter of 1000 ml (Hsu et al., 1965). The proportional counter is operated with CO2 as the filling gas at a pressure of 1216 mm Hg at room temperature of 20°C. Working voltage is 4.7 Kv, with a plateau length of more than 700 v and a plateau slope of ca. 1% per 100 v. Background is reduced to 5.1 counts/min and the counting rate of the NBS oxalic acid standard is 9.4 counts/min at the normal counting pressure of 1216 mm Hg.

Type
Research Article
Copyright
Copyright © The American Journal of Science 

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