Table 1 Radiocaesium isotopic data for samples that exhibit consistent isotopic ratios with Reactor Unit 3. Uncertainties estimated to 2SE.

From: Spatial pattern of plutonium and radiocaesium contamination released during the Fukushima Daiichi nuclear power plant disaster

Sample location Sample type 134Cs/137Cs activity ratio 135Cs/137Cs atom ratio 137Cs specific activity* (Bq g−1)
Minamisoma Road side dust 1.02 ± 0.07 0.357 ± 0.002 114 ± 9
Minamisoma Sediment 1.04 ± 0.05 0.357 ± 0.002 778 ± 58
Katsurao Moss 1.07 ± 0.04 0.356 ± 0.002 1040 ± 77
Okuma Soil 1.03 ± 0.08 0.354 ± 0.005 53.12 ± 4
Reactor Unit 3 (ORIGEN) 1.04 0.356
  1. *Activity per unit mass of leached (8 M HNO3) sub-sample (~1 g).