110 



ISOTOPIC TRACERS AND NUCLEAR RADIATIONS [Chap. 4 



ENERGY IN MEV 

 7 8 9 



50 



40 



30 



RANGE OF PROTONS IN AIR 



5 to 18 mev 

 15° C, 760 mm. Hg, 1 = 80.5 ev 



Redrawn from M.S.Livingston and H.Bethe, 

 Rev. Mod. Phys. 9,269(1937) 



12 13 14 15 



ENERGY IN MEV 



Fig. 24 



b 1 1 ' ' 1 i I 



170 



150 



16 



17 



18 



130 



