Reports

Aluminum-26 and Beryllium-10 in Marine Sediment

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Science  21 Jun 1968:
Vol. 160, Issue 3834, pp. 1348-1349
DOI: 10.1126/science.160.3834.1348

Abstract

Activities of aluminum-26 and beryllium-10 in marine sediment were measured at 0.01 ± 0.13 and 4.4 ± 0.9 disintegrations per minute, per kilogram dry weight, respectively. Only an upper limit of 0.03 could be determined for the ratio of aluminum-26 to beryllium-10 in the sediment. The ratio is probably explained by production by cosmic rays in the atmosphere.