-60 



•60 -40 -20 20 40 60 80 



Temperature in *C 



(aj 



100 



5 - 



o 4 



•C 3 



Variation of T-l Phage cross section (deulerons) 

 with temperature 



50 100 150 200 250 300 350 400 450 



Temperature in 'Kelvin 



(b) 

 Fig. 3.8. Effect of comliined primary ionization and temperature on T-l. 

 (a) shows the effect of X-rays, and (b) deuterons. There is clearly a differential 

 sensitivity corresponding to two types of radiation action, one intense and the 

 other more gentle and depending on the condition of the virus. 



94 



