IONIZING RADIATION AND VIRUSES 



KHylev. 

 Deuteron 



75 



(WH ;a^ 



1 '^ n»iit» 



Deuteron 



(c) 



Q o-i^ ..' :- Oo .' b - . . \ ' 0"VOo ar. 



ci) i a^ ' Q " -QP^-aQc^cK:icf° ,^^;p,.t,ci, 



(a) 



O PRIMARY IONIZATION 

 -o-- SECONDARY IONIZATION 

 • EXCITATION 



(b) 



Fig. 3.2. Events along, (a), and across, (b), the track of fast particles. The 

 large circles are primary ionizations, the small circles secondary, and the black 

 dots are excitations. The very large circle in (a) is about the size of a protein 

 molecule, as the vertical dashes are 100 A apart. 



