Output Pulse Period , Seconds 002 0.1 I 10 100 Gamma Intensity , ¢/hr Figure B.3 GITR 103 low-range detector output pulse period as a function of gammaintensity for Co* and Cs'*’. The longitudinal axis of the detector n ° rey nd Output Putse Period, Seconds 8 and the beam are parallel, and the electronics housing is directed away from the source. a2 0. ' Gamma Intensity , 10° r/he Figure B.4 GITR 103 high-range detector output pulse period as a function of gammaintensity for Coand Cs'3’. The logitudinal axis of the detector and the beam are parallel, and the electronics housing is directed away from the source. IN ys 362