ANTIMONY 125 BARIUM 140 BETA SOURCES CERIUM 141 CESIUM 137 GRASS IODINE 131 MANGANESE 54 NEPTUNIUM 237 NUCLEAR EXPLOSIONS PLANTS #PLUTONIUM 239 RADIATION MONITORING RADINACTIVITY e et RADIONUCLIDE KINETICS RUTHENTUM 103 SOILS STRONTIUM 90 SURFACE WATERS THORIUM 230 TRITEUM USA ARGON 41 BERYLLIUM 7 BETTIS CERIUM 144 COBALT 60 HUMAN POPULATIONS LANTHANUM 140 MILK NIOBIUM 95 PADUCAH PLANT +PLUTONIUM 238 RAQTATION DOSES RADIOACTIVE WASTES RADIOECOLQGICAL CONCENTRATION RHODIUM 106 RUTHENTUM 106 STRONTIUM 89 SURFACE AIR THORIUM 228 THORIUM 232 URANIUM ZIRCONIUM 95