174 PENETRATION PHENOMENA IN LIQUID WATER 



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DISCUSSION 

 Eyeing: 



Various mixtures of gases, and molecules having the same composition as a 

 mixture of gaseous elements, did not, in studies we carried out many years ago, 

 give differences of the order of 20 per cent in their stopping powers for the same 

 ionizing radiation. If these results are to be accepted — namely, that there is no 

 substantial contribution to the stopping power of the binding energies — then one 

 must speculate as to the differences between water in the liquid state and water 

 in the gaseous state. This, Platzman has done. I find it difficult to believe that 

 there would be differences as great as 20 per cent between these two states. I 



