FALL-OUT OF RADIOACTIVITY IN THE CHICAGO AREA DURING JANUARY, FEBRUARY, APRIL, AND MAY, 1951. PART I. RADIOCHEMICAL STUDIES. PART II. RADIOAUTOGRAPHIC STUDIES
Technical Report
·
OSTI ID:4279072
Radioactivity from the Nevada tests was found in the air filter samples taken in the Chicago Area on January 29 and 30, 1951. The highest concentration of long-lived beta activity was 150 mu mu c/m/sup 3/; alpha activity was less than 0.1 mu mu c/m/sup 3/. Radiochemical analysis showed that the beta activities were fission products and Np/sup 239/. Since the natural radioactivity of radon and thoron and their short-lived daughters averages about 200 mu mu c/m/sup 3/ for either alpha or beta activity, dust from the tests increased the radioactivity of the air less than twofold. Snow collected in Chicago on February 5 contained 10 mu mu c of beta activity per milliliter of melted snow. A small amount of fission product activity was also detected in air filter samples taken during the period of April 25 to May 7, 1951. The concentration of long-lived beta activity was less than 1 mu mu c/m/sup 3/. (auth)
- Research Organization:
- Argonne National Lab., Lemont, Ill.
- DOE Contract Number:
- W-31109-ENG-38
- NSA Number:
- NSA-13-011018
- OSTI ID:
- 4279072
- Report Number(s):
- ANL-4739(Del.)
- Country of Publication:
- United States
- Language:
- English
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