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Multifractal Analysis of the 137Cs Fallout Pattern in Austria Resulting from the Chernobyl Accident.

Pausch, Gerhard; Bossew, Peter; Hofmann, Werner; Steger, Ferdinand
Health Physics:
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Abstract

The cumulative deposition of the 137Cs fallout in Austria resulting from the passage of the Chernobyl cloud has been investigated by applying correlation dimension and hyperbolic frequency distribution methods. For the analysis, a total of 1,881 deposition values were used, which were collected by the Federal Environmental Agency of Austria and the Federal Ministry of Health, representing all available measurements Of 137Cs in soil made in Austria after the Chernobyl accident. From these data a hyperbolic exponent for the frequency distribution of 4.0 and a set of fractal correlation dimensions, which decrease from 1.426 +/- 0.022 (for the whole network) to 0.706 +/- 0.047 (for 137Cs values 2: 100 kBq m-2), were derived, thus confirming that the fallout pattern can be described as a multifractal.

(C)1998Health Physics Society