234Th/238U activity ratios in Pacific Ocean bottom waters |
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Authors: | B.S. Amin S. Krishnaswami B.L.K. Somayajulu |
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Affiliation: | Tata Institute of Fundamental Research, Bombay India |
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Abstract: | The234Th/238U activity ratios in the near-bottom waters at a station in the South Pacific have been measured. The activity ratios are close to the secular equilibrium value, ranging between 0.9 and 1.13 (± 8%), suggesting that the rate of removal of234Th by bottom-water scavenging processes at this station is slow compared to its rate of radioactive decay. The mean234U/238U activity ratios in these waters is 1.14 ± 0.02, the same as the reported values for the world oceans. |
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