liAlili) COMMONER 



371 



z 

 o 



I— 



u 





12 - 



- 



DECAY slow component 



.CP 



O ^ fast component 



10 



20 



30 



TEMPERATURE C° 



Fig. 7. Analysis of tlie rate of onset and decay of the ESR signals yielded by 

 Chlorelln at various temperatures. The values indicated are gi\en in arbitrary scale 

 units and represent the relative signal intensity accounted for by onset and decay 

 processes which follow a fast time-constant (10 to 11 sec.) and slow time-constant 

 (20 sec.) respectively, as explained in text. 



ingly larger part of the overall loss in signal intensity as the tem- 

 perature is reduced. In contrast, over nearly the entire range of 

 temperatures the slow component contributes a constant part of the 

 decay process — about 8 units on the scale of meter deflection. 



The relationship between the slow onset and fast decay processes 

 apparent from these data is shown more explicitly in Fig. 8. This 

 figure shows that when the signal exceeds 8 meter units, the amount 

 of the fast decay is about equal to the excess, over 8 units, in the 

 signal intensity. 



