240 Wheelock — Nature of Ionization Produced hy a Hays. 



Parallel Field. Source 2-6'''" from the middle of the chamber. 



Current 



Volts /cm. 



^ A 



Without 



With 



Ratio 

 of 





gauze 



gauze 



Currents 



5 



7-7 



3-13 



2-46 



10 



8-35 



3-35 



2-5 



20 



9-12 



3-59 



2 54 



40 



9-65 



3-76 



2-57 



100 



10-6 



4-2 



2-52 



200 



11-2 



4-51 



2-48 



400 



11-5 



4-7 



2-45 



Perpendicular Field. 







Source 2 •6'"" 



from the mi 



ddle of the 



chamber. 





Current 







t 





, Ratio 

 of 



Volts /em. 



Without 



With 





gauze 



gauze 



Currents 



2-1 



9-88 



5-25 



1-88 



4-2 



13-25 



6-5 



2-04 



10-6 



17-33 



7-82 



2-22 



21-0 



20-0 



8-85 



2-26 



43-0 



22-2 



9-62 



2-31 



85-5 



23-6 



9-95 



2-37 



126-0 



23-8 



10-05 



2-38 



168-5 



24-0 



10-12 



2-38 



211-5 



24-1 



1014 



2-38 



The ratio of currents is approximately constant for the 

 parallel field but increases with, the potential gradient for the 

 perpendicular field ; this is as would be expected if the ions 

 are initially formed in columns. For the perpendicular field 

 the ions of one column might interfere with those of another. 



(b) Two specimens of polonium were then used, one of 

 which was about twenty-nine times as strong as the other, and 

 the following data were obtained : 



Parallel Field. Source 2-6'^'° from the middle of the chamber. 

 Current 



'olts/cm. 



Weak 

 Polonium 



3 min. 

 readings 



Strong 

 Polonium 



1 min. 



readings 



cap. 



196-46 added 



Ratio 



of 



Currents 



Ratio 



for 3 min, 



readings 



without 



cap. 



5-25 



1-39 



6-82 



4-9 



29-4 



20-9 



1-63 



8-0 



4-9 



29-4 



42-5 



1-75 



8-55 



4-89 



29-34 



86-3 



1-91 



9-42 



4-93 



29-58 



196-3 



2-08 



9-85 



4-73 



28-4 



3550 



2-15 



10-1 



4-7 



28-2 



