EXTERNAL GAMMA RADIATION Graph 1 GAMMA DOSE RATES ON THE ISLAND OF RONGELAP MILLIROENTGENS PER HOUR 100 10 1.0 Gammo Dose Rotes Three Feet Above Ground on Island of Rongelap, ‘——- —<= Theoretical Decay According to (Time)”!+2 (Starting D + 1 days). eascsceee Estimated From Reletive Theoreticol Gamma Dose Rotes, Decay Rotes of Fission Products, Energy of the Gammas, ond the Number of Gomme Fhotons Per Disintegration. 1.0 10 100 TIME AFTER DETONATION (Doys)