STRONTIUM-90 IN MILK 1957 to 1960 AND ITS RELATION TO RADIOACTIVE FALLOUT IN CENTRAL EUROPE
The minimum Sr/sup 90/ content found in milk was 1.0 strontium units in January 1957 and September 1959 and the maximus value was 12.0 strontium units in December 1958. The Sr/sup 90/ content in dairy milk was somewhat higher in the autumn of 1957 when several nuclear tests took place. A considerable increase was registered in the winter of 1958 ard 1959 after a larger series of nuclear tests during 1958. Since the autumn of 1959, fall-out activiyy has decreased rapidly. In February 1960 about 0.5% as much activity as was measured in the second half of 1958 was found. This decrease is due to the temprary suspension of nuclear tests which began in November 1959. The systematic long-term study of decay curves of fall-out samples with high acitvity showed that in Europe highly active fallout represents an almost isolated set of fission products. Background due to previous tests was practically negligible. Sr/sup 90/ and Y/sup 90/ ccntant do not exceed 1% of fall-out activity at present. (auth)
- Research Organization:
- Karlova Universita, Hradec Kralove, Czechoslovakia. Lekarske Fakulta. Ustav Fysiky
- NSA Number:
- NSA-15-011355
- OSTI ID:
- 4080595
- Report Number(s):
- A/AC.82/G/L.503
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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