EXTERNAL GAMMA RADIATION 1000 Graph 1 GAMMA DOSE RATES ON THE ISLAND OF RONGELAP MILLIROENTGENS PER HOUR a e. a: 100 10 1.6 Gamma Dose Retes Three Feet Above Ground on Isiand of Rongelap, ‘moe mm Theoretics! Decay According to (Time)”!*2 (Storting D + 1 days), “, -: pe‘ PP kam Ropes a ms . : we svssesens Estimated From Relotive Theoretical Gamma Dose Rates, Decay Rates of Fission Products, Energy of the Gammas, ond the Number of Gamma Fhotons Per Disintegretion, 1.0 | 10 L 100 TIME AFTER DETONATION (Days) 1000