Comparison of the isotopic abundance of U 235 and U 238 and the radium activity ratios in Colorado Plateau uranium ores

Details Comparison of the isotopic abundance of U 235 and U 238 and the radium activity ratios in Colorado Plateau uranium ores Comparison of the isotopic abundance of U 235 and U 238 and the radium activity ratios in Colorado Plateau uranium ores

Mar 1957

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1957gecoa..11..189s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 11, Issue 3, pp.189-193

Physics

1

Scientific paper

The isotopic abundances of uranium and the radium activity ratios of eleven samples of uranium ore from the Colorado Plateau have been measured. No significant variation in the isotopic abundance of the uranium was noted; with'in the experimental error, the average U 235 /U 238 ratio is 137.7. There is a significant variation in the Ra 226 /Ra 223 activity ratios (0.048-0.143), which indicates a relatively recent alteration of the ore samples. The variations do not, however, explain the lead-uranium and lead-lead age discrepancies.

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