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Science 24 January 1964:
Vol. 143. no. 3604, pp. 349 - 351
DOI: 10.1126/science.143.3604.349
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Articles

Fission-Track Ages and Track-Annealing Behavior of Some Micas

R. L. Fleischer 1, P. B. Price 1, E. M. Symes 1, and D. S. Miller 2

1 General Electric Research Laboratory, Schenectady, New York
2 Rensselaer Polytechnic Institute, Troy, New York

The density of tracks from spontaneously fissioning uranium atoms in mica has been used to make quantitative measurements of geologic ages. In comparison with methods in which ages are derived from measurements of radioactive decay products, the fission track method is much simpler and is usually accurate for micas up to a few hundred million years old. Annealing experiments suggest that high ambient temperatures are responsible for track fading in the older samples.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Etched tracks and serendipitous dosimetry.
R. L. Fleischer, S. Chang, J. Farrell, R. C. Herrmann, J. MacDonald, M. Zalesky, and R. H. Doremus (2006)
Radiat Prot Dosimetry 120, 450-456
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Tracks of Charged Particles in Solids.
R. L. Fleischer, P. B. Price, and R. M. Walker (1965)
Science 149, 383-393
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Fossil Particle Tracks and Uranium Distributions in Minerals of the Vaca Muerta Meteorite.
R. L. Fleischer, R. L. Fleischer, C. W. Naeser, P. B. Price, R. M. Walker, and U. B. Marvin (1965)
Science 148, 629-632
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