i ' 3t ‘: 3 i + 1 5 the chemical and radiochemical composition of solid fallout as a funotion of particle size, zero~point environment, time and distance of collection, and gross decay characteristic Pots the chemical a fie- radiochemical nature of liquid fallout and base sunece y ste A sample of solid fallout from Shot 1 was separated into 14 part. icle-size fractions which were analyzed for,Se5%—er?3,~ ; andes,| In, gach case the activity per unit weight of ‘acttve particles below 50,was “found to decrease regularly with inereasing size, but in a different manner for, each muclide, indicating radiochemical fractiona- tion . Above 50;~ ‘the’ relationships were obscur, The gross decay did not vary at all with Eattislesles otearty tines and only. slightly at later“tines. (in the fallout from Shots 1 and 3,” $r89-and-Satho showed a greater tendency to concentrate in the liquid phase than the other fission products studied. Shot 4 fallout samples, principally liquid, ovtained—frem-a Project—2r5b-intermittent—falloutcallector indicated that the relative concentrations of; Sr9-and-—Bat4O increasewith time of collection. The-base—surge-—sampling-program_was-unsuccesetite No information was obtained on variations of eorposition with distance. < eS7 ~7, Zv- 7S, Meo? ba “149, Jord cle 4K ee svi9e ard G2 -/ 40 5-6 SECRET — RESTRICTED DATA +i :: ’