192 TT I 10° — T TT rT re MEV a = [ MEV _ 4 2 Ee Zz — 7 [ Zz — | < < 4 Lo _ } —o_ pe = _ 5 Oo Oo | ~ WY wi Zz 1 a = 4 r r _| L Fig. 12—Field gamma-ray calibration spectrumfor '*Sb. 4 10 0 48,000 T i L | 10 20 30 T | 40 dt i | 50 60 70 80 CHANNEL NUMBER 44,000 -40,000 F- — = 36,000 F- ~ 32,000 L — a 28,000 [- — Z oc Z 24,000 + © < 20,000 -- - a T WW = , © 16,000 4 oS bid 5 Oo 4,000 — \w ™ 0 Nee 4,000 l 0 20 40 Vf l 60 fn i 80 ya Neat te l l l | 100 120 140 160 4 — 180 CHAMBER NUMBER Fig. 13—~Residual gamma-ray spectrum after removal of ?®TI, !Pr, 214i, K, Mn, %Zr—8Nb, 157Cs, and Sb, June 28, 1964. 200