title: STRONTIUM 90: ESTIMATION OF WORLDWIDE DEPOSITION.
abstract: The relation between the worldwide deposition of strontium-90, as calculated by many investigators over the last decade, and that observed in rainfall in New York City has been relatively constant. On the average, for each millicurie of strontium-90 per square mile deposited in New York City, 0.055 megacurie has been deposited on the earth's total surface. Cumulative deposits of strontium-90 on the earth's surface at various intervals over the last 10 years have been computed from this ratio. From the mean quarterly fraction of the annual strontium-90 fallout in New York City for the last 9 years, the worldwide deposition of this nuclide, equal to 2.48 megacuries, is predicted for 1964.
mesh_terms: D009518:New York; D009519:New York City; D011847:Radioactive Fallout; D013324:Strontium; D013325:Strontium Isotopes
chemical_list: D011847:Radioactive Fallout; D013325:Strontium Isotopes; D013324:Strontium
keywords: NEW YORK; RADIOACTIVE FALLOUT; STRONTIUM ISOTOPES