DNA 1240H-2 V = volume of the base surge that corresponds to the buret condi- tions considered (expressed in effective-mean-free-path units). X = distance from P to element dV of the source of radiation, measured in effective-mean-free-path units. Jo = Volume source density in Mev/cm3 -sec. Values for J, are caiculated by evaluating the expression Jo = 1. 0¢3 10M Mev /em> -seC (17-7) where g¢ = the fraction of the total fission-product activity that “ " is in the base surge. It has been assigned the values shown in Table 17-4 for optimum agreement with test data. weapon yield, in KT V = base-surge volume in cm? 1.5x 10°3 = the number of fiasions per kiioton of weapon yield E(t) = the energy emission rate of the fission products >! = 2.78 47223 2.41 get Mev/see-fission 17-50 setae ee + oe (17-8)