2. sr”, A, 7 7049 x 1077 day he @ 30h] x 10°gay? K=269x10° Shot 91 a* 99(2069 19-7 “Gh? a pweOcl0 Ro = 18 (0.0913) = 0,066 Shot. 23 a = 13.4 (0.066) = 0,S8ue at 27 days. The uptake of Sr” is negligible in comparison with that of sr°’, 3. sr, A, 21.713 A, 3047x109 ew 0,652 Here t, « 0.146 day, since this is a short lived nuclide. ae 23(Ge6e1)3 (eteM3t_, “1cTA3t-0,00347(t-t,) The buildup of sr’ reaches a peak and then falls off within several dayst Shot 9: ts 0.3d at Satu id ad ld ad 130ue hous Salma Sau For the Shot 2 caset tz O.5d as 1200 Tt 48 seen that a considerable concentration of Sr’ exists for 2 or 3 days, which shortly disappears. _ In its place, however, the daughter product YOl remains, as will be seen in the next calculation. Seeee ae ak