1000 Gamma exposure rate (mR/h) ~ 100 10 Gamma doserates three feet above ground onisland of Rongelap. —-—— Theoretical decay according to {time)7!2 (starting D + 1 days). covccces Estimated from relative theoretical gamma dose rates, decay rates of fission products, energy of the gammas, and the number of gamma photons per disintegration. ! 0.1 10 . 100° Time after detonation {days) 1000 LRA-5