PRINCIPLES OF RADIOLOGICAL PHYSICS 



30 



53 



50 

 kev 

 ENERGY OF 



too 0.5 



Mev 

 PENETRATING 

 (a) 



PARTICLE 



30 



m 



20 



Z 



o 



z 



a. 

 a. 

 o 



w 10 



^/ 4/5/ ^/"^ 



I w l/\ \^^\ \ I I I I 



oo o— oj inoo ooo o— cvj ooo ooo o — 



OOO — CViinoOO — (MiDOOO 



— cjif) — c\jin -(Mio 



ev kev 



Mev 



ENERGY OF PENETRATING PARTICLE 

 (6) 



bev 



Fig. 1-36. Approximate plots of the stopping number of atomic electrons as a function 

 of the nature and energy of the incident particle. Graph (a) linear energy scale; 

 (6) logarithmic energy scale. {Courtesy M. Lewis.) 



