» 10 @ a ~ oe a = o _~ Qo c o | oC 2 uw. 4 pf 10ao! L y \ io? oo 102 y 2 10 § 10 ¢ 10 ® Tid 10” Gamma Exposure Rate,r/hr Figure 2.3 Graph showing typical calibration curves for the Gustave detectors. These detectors were calibrated with the 250-kv X-ray i) to fii, 10 Qo 7 °o Relotive Response generator and the 2.5-Mev Van de Graaff generator. 10 Energy, kev . Figure 2.4 Energy dependence of Gustave I detector normalized to Co” energy (1.25 Mev), dose rate 100 r/hr. 23