EGRETrercteppay ~~ gms ~ — 2 = ( me ( x 0018933 fusion and with solid particles, The radionuclide atoms present will collide frequently with oxygen atoms or molecul¢s and, since the mzjority of them are electron donors, metallic oxide molecules will be formed which become thermodynamically stable 2s the temperature falle, The cxide molecules, or free rediona- clide atoms, also have frequent collisions with the liquid drops of environmental material (silica, alumina, iron oxide or czlcium oxide) and these collisions may be inelastic since in some cases the incoming mcelecules will be held by strong attractive forces. The redicactive oxide molecules which condense at the liquid surface will spread ixto the interior of the drops and become more cr less uniformly distributed threughcut, Later, after the liquid drops have frezen, the incoming radionuclide molecvles may be held by surface forces, Another way in which the radionuctli erences 4 and 6}, Dus ta the very low concentrations of the radionuclide oxide mole‘ther will be relatively infrequent 2nd it a f£ this type to form 2 drop [Fe