ET TTT FLATHEAD AND NAVAUJO PTT CONTINUOUS FLOW PROPORTIONAL DETECTOR © YAG 40 A-1, 3473/8 FL. SHELF | © YAG 40 A-1, P-3753/8 “2 NASHELF 3 FLATHEAD LT TTT 104 FISSION ) 4 e SHELF 3 J NAVAJO ( COMPUTED) ET TTT | LL LLL 1 PEL 10° 10 LLL 10 AGE (HR) Figure 3.38 Beta-decay rates, Shots Flathead and Navajo. 111 BS TT TTT TTT ACTIVITY ( COUNTS/SECOND SHELF 1 ( COMPUTED )