lifetime dose. KALLOGGs (continued) The next slide. This is an ettempt to explain something tha Colonel Lulejian's data én terms of the fraction which is finction of the height of burst and yield, came out of eq nged as 0 As a matter of fact it was presented to us as a function of a ratio, the ratio being height over yield to the 1/3 power, and thare seams to be some consistency in Bhe fact that st & gurface burst vhen this ratio was sero, height was serc ve get a very large fraction. There is differing opinion betveen some cf bhe people vho studied the JANGLE surface shot, which is the only Nevada gurface shot that we can point to. ‘There seaza ta be some differnce of opinion as to just how much di4 come dovn in the first few hours, but it seems fo have been vary large, perhaps between 70 and 100% is a representative Pigure, althougs I must talk adout this tomrrow vith Dr. Cadle. As we go tol larger values of this ratio ve approach sero scavenging, and the interest g thing to us was that sero scavenging occurred when the firebal. was ox just a little — bit above the ground, end vben all the pictures showedthe dist going up inte the mushroom, we though that this vas something thet had to be explained before we vent into it any further, ani so this is a tentatife explamtion,... This is the alr burst -~ I doa't think we need to comment on/that. The mushroom goes up, the dust colum is always formed, but it paver roaches the mushroom, #0 we wouldn't expect any dust scavenging. Te other extreme -- the surface burst, or very near surface bu we have the » where we have dust going ughnd mixing with the hot fireball when it’s[still in on early stage, and then I think in this case we vould expect 1 without going into any more detail than just saying that the dust and the molten and yaporized radicactive material wore together. Then we have low air burat, which fs a difficult one to explain, becusse Department of Enerny i me ~~ Histariat sot . fhe case of & does not show