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Science 6 November 1964:
Vol. 146. no. 3645, pp. 762 - 764
DOI: 10.1126/science.146.3645.762
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Articles

Air Concentrations of Twelve Radionuclides from 1962 through Mid-1964

R. W. Perkins 1, J. M. Nielsen 1, and C. W. Thomas 1

1 Hanford Laboratories, General Electric Company, Richland, Washington

New spectrometric techniques for the multidimensional counting of gamma rays permit the direct measurement of twelve radionuclides collected on air filters. Observed concentrations of Be7, Na22, Mn54, Co60, Y88, Zr95-Nb25, Ru166, Sb124, Sb125, Cs134, Cs137, and Ce144 during the past 2frac12 years help to explain the origin and fallout rates of the trace radionuclides in air.


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