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Illumination of a Black Box: Analysis of Gas Composition During Graphite Target Preparation

Published online by Cambridge University Press:  18 July 2016

A. P. McNichol ,
A. R. Gagnon ,
G. A. Jones  and
E. A. Osborne
A. P. McNichol
Affiliation:
Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 USA
A. R. Gagnon
Affiliation:
Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 USA
G. A. Jones
Affiliation:
Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 USA
E. A. Osborne
Affiliation:
Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 USA
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Abstract

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We conducted a study of relative gas composition changes of CO2, CO and CH4 during the formation of graphite targets using different temperatures, catalysts and methods. Reduction with H2 increases the reaction rate without compromising the quality of the AMS target produced. Methane is produced at virtually any temperature, and the amount produced is greater at very low temperatures. The reduction of CO to graphite is very slow when H2 is not included in the reaction.

Type
I. Sample Preparation and Measurement Techniques
Information
Radiocarbon , Volume 34 , Issue 3: Proceedings of the 14th International Radiocarbon Conference , 1992 , pp. 321 - 329
Copyright
Copyright © The American Journal of Science 

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