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20Figure 1.15. Spotty concentration (Ci/km 2 ) <strong>of</strong> Cs-137 (above) and Ce-144 (below) inthe forest bedding in the 30-km Chernobyl zone. Scale 1:600 (Tscheglov, 1999).in these forests last autumn. The level <strong>of</strong> Cs-137in chanterelles, boleros and stalks <strong>of</strong> mushroomsexceeded the norm by approximately forty times...” (Chykin, 1997)There is still uncertainty in regard to contaminationnot only by Cs-137 and Sr-90, butalso by other radionuclides, including beta andalpha emitters. Detailed mapping <strong>of</strong> territoriesfor the varying spectra <strong>of</strong> radioactive contaminationcould not be done owing to the impossibility<strong>of</strong> fast remote detection <strong>of</strong> beta and alpharadionuclides.Typical Chernobyl hot spots measure tensto hundreds <strong>of</strong> meters across and have levels

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