ALPHA PARTICLES 571 



Alpha particles have proved very useful in irradiating limited por- 

 tions of cells. Irradiation of the nucleus has been shown, in two distinct 

 investigations, to be particularly important in producing various harm- 

 ful effects. 



Alpha particles, when emitted in the mammalian body at relatively 

 low rates for considerable periods of time, produce serious pathological 

 conditions, including malignant growth. 



REFERENCES 



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