Protactinium-231 Content of Ocean Water and Sediments

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Science  09 Dec 1960:
Vol. 132, Issue 3441, pp. 1761-1762
DOI: 10.1126/science.132.3441.1761-a


By means of a direct method for determining the nuclide protactinium-231, a deficiency in ocean water was found to be accompanied by unsupported Pa in ocean sediments. Protactiniumionium ratios obtained for a surface and a deep section in the same equatorial core yielded apparent ages which were in agreement with predicted ages.