1. X. G. Stewart, R. G. D. Osand, R. X. Crookey, Mas E. X, R, Fisher, X. J. Omers, AERE HP/R 2790 (1959). 137 2. V. H. Langhaa and E. C. Anderson,"Ce" Biospheric Cortsminetion from Huclear Weapons Tests,” Fealth Furg. I. (in press), 3. X. Elsenbud, "Measurements of Strontiu-90 in (sophysical and Biological Material," Hearings before the special subocusittee on radiation of the Joint Committee on Atomic Energy, Congress of the United States, Part 1. pp 554-575 (1957). 4. E. C. Anderson, R. L. Schuch, W. R. Fisher and V. H. Langham, "Radioactivity of People and Foods," Science 125(3261): 1273–78 (1957), 5. V. R. Eskelmann, J. L. Kulp, A. R. Schulert, "Strontiu-90 in Man, II," Science 127(3293): 266-74 (1959). 6. P. F. Gustafson, L. D. Marinelli, and S. S. Brar, "Natural and Fission-Produced Gamma-Ray Emitting Radioastivity in Soil," Solerge 127: 1240-42 (1958). 7. P. F. Gustafson, "The Ratio of Ca137 and S90 Radioactivity in Soil," Science (in press), 8. G. M. Dunning, Hearings before the special subcommittee on radiation of the Joint Committee on Atomic Energy, Congress of the United States, Part 1, pp 239-40 (1957). 9. B. Hultqvist, "Studies on Naturally Occuring Ionizing Radiations," Kgl. Svenska Ventenskapsakad. Handl. 6(4), no. 3 (1956). 808 RADIATION PROTECTION 10. Report of the United Nations Scientific Committee on the Effects of Atomic Radiation. General Assembly Official Records: Thirteenth Session, Supplement no. 17 (A/3838), Nov Tark (1958). 11. H. F. Libby, Radioactive Strontium Fallout,* Prog. Nat. load. Sat., II. §. 42: 365-390 (1956). 12. E. A. Marts11, "Atmospheric Aspects of Strontiu:93 Fallout,* Salerae 129(3357): 1197-1205 (1959). 13. W. F. Libby, "Stratospheric Fallout Particularly from the Russian October Series," USAEC, TID-5556, May 1959. 14. H. Eizenbud, "Deposition of Strontium-90 through October 1958," Safenge 130(3367): 76-80 (1959). TABLE I Gamma-Ray Emitting Fallout Radioactivity on the Ground at Argonne National Laboratory ** 23.95 *** Totals include activity due to both Zr95 and Nb Soil collected 40 miles from the Argonne site gave essentially the same results as the ANL soils, indicating that any contamination from the reactors at Argonne is of secondary importance in this study. Assuming Zr Nb to be in equilibrium. 1.e. May 1957 360 mc/mi2 from these two isotopes. |