Radionuclide Concentrations in Surface Air: Direct Relationship to Global Fallout

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Science  17 Oct 1969:
Vol. 166, Issue 3903, pp. 376-377
DOI: 10.1126/science.166.3903.376


By relating the average monthly hemispheric concentrations of radionuclides in the suirface air to the monthly hemispheric fallout of these nuclides, we have derived proportionility constants. For every disintegration per minutte of a radioactive nutclide per 1000 cubic meters of the suirface air in the Northern Hemisphere, 3.3 kilocuirics of that nutclide will be deposited on the surface; in the Soluthern Hemisphere, 5.0 kilocutries will deposit for every disintegration per minutte per 1000 cuibic meters. Oni the basis of thlese factors, the global deposition of radionuclides can be estimated from a relatively small numbnber of measurements of the radioactivity in the surface air.

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