0.693 cm? ii aq qZ— absorption coefficient for B radiation “mg of Mo?? fraction of disintegrations detected by counter as measured with Ra DtE standard . . disintegration rate of Mo 99 _ R o° ett = NX = Tare = y* 4" 'ssa’ & where N = Mo?” atoms and XX = SOE = 1.749 x i0~* min”! fissions represented by sample, f d. Nk ~ 1,749 x 10°x fission yield of Mo9? Calculation of Fission Yield. Given the above information on num- ber of fissions and amount of uranium in the sample the fission yield can be calculated as follows: is i i Fiss ion yiel d in megatons e. \ on he ; initi i al uranium i x £3 fissions in sample uranium in sample x 1.45 x 10°° fissions /megaton Fission Ratio Determination. With the results of the fireball meas - urementof total yield and the radiochemical measurementof fission yield, the fission fraction can be calculated as shown: ‘Fission ratio = 2288ion yield in megatons Total- yield in megatons we Lee - 56 - X