1.0 = ee ee e e e ee e ee = r 4 ouL— = Foe = - * — | & Poy->~—-~~~-- dv : GAMMA BACKGROUND) = —_—a \.tStstCSS 0.01;— 41 = S E 00% = _ ap — ay —- ag ABSORBER THICKNESS (mg. /q om.) Fig. 3.23 Example of Beta Range Measurement, Shot 1, How 2 - 24 hr Sample, Th r