} 2&7 FAST NEUTRONS PERCENTHGE LIFE SPAN SHORTENING H= [H 7] DURATION-OF-LIFE EXPOSURE N= (N 3] eeeee E= | Aer FAST NEUTRONS (MONOEN. + F!ISSION)D X- RAND GAMMA-RAYS [E 2] T= MICE «MALES + FEMALES) [M [M 7] H M4 H 5 5° 5 TS OT i M 6 G 4 TE CF 5 4 M L= N N “2a — _. AN 2 5 L M= s= G= ‘'L 6] [M 7! [g§ 4] (¢5] T N i X—AND SRM GAMMA-RAYS AR LANG nnneats 4 E ‘ g _—e 7 I - G L§ 5 L S 7 | 1 DOSE-RATE ’ _ : | Hu «<RAD/DAY > Figure IX. The relattonshtips between dose-rate and the life-shortening effect following duratton-of-life exposures of fast neutrons and low-LET radiations in the mouse. Various experiments. 7 l|\MheY