CHAPTER & RESULTS 4.1 SECT 1: STZE-GRADED FALLOUT FROM ROW Tn order to obtain activity per unit weight of active perticles only, correction must be made for the -per cent of inactive particles in the sexple. The values for per cent active particles (by volume) obtained from the autoradiogrzrhs are listed in Table 4.1 along with TABLE 4.1 Particle Size in p 5.08 10.3 23.3 Per Cent Active Particles - Shet 1, How Station Observed Per Cent Active Particles 172 79.9 239 + My 4.16 11.3 36.5 48.5 84.8 95.3 84.5 75.8 91.6 215 See 4.16 63.7 29.5 43.7 62.4 70.5 25.8 113 116 Per Cent Active Particles from 35.8 49.6 84.8 86.8 86.8 86.8 86.8 750% 86.8 96.8 86.8 86.8 86.8 96.9 the values read from the smooth curve (Pig h.l). Table 4.2 lists th gee)709goncepgrast 1g (activity per unit weight of fallout) of Ca 8 and Ce and the gross activity concentrations for the vagsous size fractions correctedof,= per cent active particles. Data on tae4 are not included because Na¢4 samples were containated with Bal40, when it was learned that the shot device contained sodium tracer, it did not appear worthwhile to undertake the task of resolving the decay curves. 28 SECRET — RESTRICTED DATA