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- Author or Editor: P. Fodor-Csányi x
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Abstract
In this paper the quenching effect of ethanol in NE 267 liquid scintillation cocktail is investigated when14C is measured at environmental concentrations. The results obtained show that with a proper selection of amplifier gain and discriminators setting it is possible to achieve efficiency as high as 80% and up to 5 g of sample carbon in the cocktail. This is very important for the direct measurement of14C for environmental protection purposes in different chemical forms without applying the standard radiocarbon procedures. In all cases the quenching effect of the chemical form in which14C is being measured has to be determined.
Abstract
The migration of HTO from a point source was studied in the soil of the storage of radioactive waste at horizontal distances of 10 to 40 cm from the source between 2 and 4 m depths at 5 different rainfalls, up to 7641/m2. The water movement changed from 0.17 cm/l (at 10 cm) to 0.28 cm/l (at 40 cm distance) when 186 1 was irrigated, while at 764 1 rainfall it was found to be 0.11 cm/l at every distance. The estimated parameters of a three-dimensional migration model constructed to characterize HTO movement revealed that the HTO distribution migrates downwards in a small, about 1 m thick layer with an initial rate of 0.17 cm/l to slow down to about 0.05 cm/l after 50 years. The distribution is spreading horizontally with a constant rate of about 0.08 cm/l.
Abstract
The measurements of14C in ethanol samples extracted from wines of different wine districts in Bulgaria and Hungary in 1986 showed that the atmospheric reservoir remained practically undisturbed by the emission due to Chernobyl accident.
