O° 20 30 18 3500 Twl01 40 4N39 Y3d 600 |. \ | (000 800 ENERGY (KEV) | : t ! . i ‘ ( Histogram of Proportion of Total Dose Contributed by Various Energy Reg.ons 400 from the Fallout Ragiation Fig. 1.2 200 La ( t t ‘ t ) 1 ' ' J t 1 4 t ' 1 4 1 4 qt ra