sy yt ‘aa Table 9 “4 Flight 28 ip >. fly fue m “fox, Initial 5/27 : 2 & 11/30 3,560 74 S83 0.12 274 dfn 272 99 &7 0.33 18,500 46 1240 0.08 210 0.32 14 35,800 d/n ": £ cre 12/18 1,400 d/m wy a sr99/o,89 sr®Sigp99 12/8 4 d/a Activity 4,800 a/m aoe 7 gg89-90 Sr 90 gas: $3 Theoretical (Ivy) _ (USSR ) a: tee roo Pe Fr 2ist showed an average of 0.08 d/n/m’, of which 0,02 d/a/e” was radibstrontiu. The stromtium percentage, as for the jet semples, was much higher than expected. & A lZegallan stainless steel pot was used to collect accumulated] rainfall ws December 23rd cf 1480 d/min., of which 745 d/min. were radiostrpntium. sr o and dry fallout on the rocf at NTO during the period of July 15¢h to Again the strontium percentage is higher than expected. “gt * oe The armlyses of samples taken during the test period indicate al lower radiostrontium content than expected, while thoes taken well er detonation show a relatively high rediostrontiim content. Sinck the re- os + “h a aw Ye as will be discussed, it i probap je that fraectiamtion hms cooprred. The late formation of Sr?” and Sr compared to the life of the] firee ball male i¢ possible that they are more highly dispersed. The] carly fallout is deficient in radicetromtiimm, since the smaller partibles remain suspended, while the later fallout ami particularly the erial stored in the upper atmosphere camtains an excess, cont high altitude measwemexts give the highest strontium peropntage, The sr9°ay89 ratios are quite constant for a given time since as show; in Table 8. However for mixed fallout from sore than the Sr? /3z88 ratio can probably be wed only as an approximatibn of the relative amount of material from each series, The mt ezzect of fractionation appears to be minim], As not the Sr § measured in soil is in good agreement with the pre ty, based on heesupgments of total fallowt in the area and the earlier, sted actiri- contribution of gr°*"99, Of interest; is the comparison of 89/90 measured in bone with Predicted in soil, The latter is based on fallout measurement the age of the fnllout inte sensiderrtion, As sucn iz Figure 7,f in bene is higher than predisted by @ factor of about 2. the ratio —_—_—_—_—_——______ 06131986.025 4. ow aS : " ype wy os - Air snuples collected on the rogt at WYO during the myer of Des 6,04 LOS 1054