= TTT TT ~ T-131 _ —~_ T-1{33 - = — | | | O$ a = \\ r| | (| 4 ™—_ _ —> ~ | : NL Z = \ 1 \I-135 \ r _| - - = c = OOs | — 74 F — — _ Oi) ATOM CONCENTRATION IN AIR, atoms cm-3 TTT | | | | | a 4 I2 ! i L l fj. | | l | l { | 16 20 24 28 32 36 40 44 48 52 56 6O HOURS POST DETONATION, hours