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Nuclear Physics Data
Atomic Weights and Isotopic Compositions
J. S. Coursey, D. J. Schwab, and R. A. Dragoset
This database contains the isotopic compositions or abundances of those elements which have characteristic terrestrial compositions. Atomic weights and relative atomic masses are also available for elements 1 through 112, 114 & 116.
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Created July 29, 2009, Updated December 20, 2021