CESIUM-137 RADIOACTIVITY IN SOIL AT ARGONNE NATIONAL LABORATORY

Radioactive decay curve (Cs-137 half life = 27 yrs.)

Plumbob

Hardtack I

Argus Hartack II

• Single shot

RUTHENIUM-103 RADIOACTIVITY IN SOIL AT ARGONNE NATIONAL LABORATORY

Radioactive decay curve

(Ru-103 half life = 40 days)

RUTHENIUM-106 RADIOACTIVITY IN SOIL AT ARGONNE NATIONAL LABORATORY

Radioactive decay curve (Ru-106 half life = 1 yr.)

CERIUM-141 RADIOACTIVITY IN SOIL AT ARGONNE NATIONAL LABORATORY

Detonations

CERIUM-144 RADIOACTIVITY IN SOIL AT ARGONNE NATIONAL LABORATORY

* Single shot