d ; 0) , EFFECTS OF IONIZING RADIATION of the 24 day value. These data indicate that most of the activity is associated with short- The residual total beta activity found in the two larger fish at 4 months post detonation av- lived isotopes. The initial drop in activity is very rapid, and after 45 days the decay curve is essentially that of Sr, the most abundant of the longer-livect elements deposited. ; : eraged 2.5 pe (Table 5.10). There was, at the sametiie, about twice as much gammaactivity. The fish were collected 86 days post detonation, and the drop in activity between that time : Table 5.10.—Beta and GammaActivity of Fish From Rongelap Three Months Post Detonation FisH #1 (802 Gat) Ba, &r ano Rake Eartit TOTAL Activity (PERCENT) Gross Acti¥sTr, we Brera Gauua RApiOcHEMICAL ANALYSIS (FLRCENT) UN Ha, Se anv Re FRACTION Srit Rare Fanti Bale Head. ....22.-- eee eee ...!| 0. 568 1. 26 9.9 Scales + Fins+ Tail.........! @ 500 0. 58 95 Viscera....- 22-23 eee ee eee 0. 900 2. 36 48.0 Gills. eee eee eee eee eee Q. 160 0.43. 7,8 13.9 6.7 79.4 Remainder of Body.......-. 0. 596 1.78 §. 3 45.2 Li. 2 43.6 Total. ........0220-- | 2.724 6.41 ! 38. 3 9.6 52.1 U4 9.9 72.7 : 1. 4 0.6 58. 0 . : Fisu #2 ($07 Gat) . : Gross ACTIVITY. uC BETA Gass — ' Fisn #3 (ifs Go 0. 23 0.015 0. O17 Viscera. 2 eee eee I. 620 20414 0.115 0. 205 Gills. ole eee lee eee : Muscle.....lo2....2202.8- | Total. ......2 22. eee. ' ; . ; ' ob 0. 101 Skeleton... eee eee ee eee i . GHoss ACTIVITY, uC Beta Gasaa Head. ..... 2.2 ee eee ; Scales+ Fins+ Tail wee eeeeee + 0. O67 0. 23 0. 043 0. of 0.15) 0. 53 0107 ga78 0. 058 038 ! ! 358 | L 0. 084 0. 023 0. 011 9030 0. 070 0. 038 O30) “ 0. O74 —_—— _ 0.461 Cuam fl Totat Beta Activity 6 4X10 pis —— eee RaMocree MICAL ANALYSIS PERCENT or Total. ACTIVITY KHADIOKLEMENT ore ee ee ee 21.4 Ray ee eee Ouher. oo... eee eee eee Sr? ee eee wees Bale ool pr cc eee essen eee Rare Earths..../..-..-----0--- 32. 4 tl. 4 07 0. 7 ad. 4 J -Surnples collected two months post detonation. 9002185 _ Meee