Author:
Walton Alan,Trautman Milton A.,Friend James P.
Abstract
Radiocarbon analyses have been performed at Isotopes, Inc. since 1957 using proportional-counting techniques. Carbon dioxide is employed as the counting gas at pressures up to two atmospheres. The counter presently in service is electrolytic copper and has an active volume of just under two liters. It is shielded by one in. of mercury, a ring of 23 G-M counters operated in anti-coincidence with the sample counter, 4 in. of paraffin wax, and 18 in. of hot-rolled steel. A background of 9.2 counts/min has been attained with this arrangement.
Publisher
Cambridge University Press (CUP)
Subject
General Earth and Planetary Sciences,Archaeology
Reference15 articles.
1. Glacial Retreat in the North Bay Area, Ontario
2. Lee H. A. , Eade K. E. , and Heywood W. W. , 1960, Surficial geology, Sakami Lake, New Quebec: Canada Geol. Survey, Map 52–1959.
3. Craig B. G. , and Fyles J. G. , 1960, Pleistocene geology of Arctic Canada: Canada Geol. Survey, Paper 60–10.
4. Yale Natural Radiocarbon Measurements III
5. Craig B. G. , 1960, Surficial geology of north central district of Mackenzie, Northwest Territories: Canada Geol. Survey, Paper 60–18.
Cited by
44 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献