SPECIFIC FALL-OUT ACTIVITY IN PRECIPITATION AS A FUNCTION OF SAMPLING HEIGHT
At eight elevations from 7 to 123m monthly samples were obtained for the period March to December l959. Each sample was radio-analyzed for Sr/ sup 90/, Sr/sup 89/, Cs/sup 1/ /sup 3/ /sup 7/, and Ce/sup 144/. A tabulation is given of the specific activities of the isotopes for each elevation during the l0- month period. A regression analysis of the results shows for all the isotopes an increase in specific activity with the height. The increase in activity per 100 meters is 15% for Sr/sup 90/, 19% for Cs/sup 137/ 27% for Ce/sup 144/ 4, and 31% for Sr/sup 89/, and an increase of 13% per 100m for the Sr/sup 89//Sr/sup 90/ ratio. The present results indicate that it is possible to detect a change in the specific activity in precipitation even within a difference in elevation of 100 meters. (B.O.G.)
- Research Organization:
- Danish Atomic Energy Commission, Riso
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-007627
- OSTI ID:
- 4112490
- Journal Information:
- Nature, Journal Name: Nature Vol. Vol: 188
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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