48 Dr. M. Siegbahn and Mr. E. Friinan : Higli-Frequency 



As the graphical representation shows, some of the groups 

 (a 2 , « 1? /3 2 ) form right lines over the whole range, while 

 others (/3 l5 j3 s , 71, 7 2 , 73) are slightly curved upwards. In 

 the first case a Moselev relation, 



v9=a(N-N ), 



is sufficient. The values of a and N for these groups are 



Fisr. 3. 



li' 



0-T 











































1.300 









































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/ 









































S 



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S 



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'X 































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/ 











y\ < 





























/, 



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y 



























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t 



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V 







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 i 





















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J 



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Sa, 



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 / 



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i 





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2 



s? 





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s 



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73 74 75 76 77 78 73 30 6/ i?2 S3 34 85 06 67 33 69 90 31 3 



2 





7 



a. V 



V. 



c 



3. 1 



: P 



t. A 



u. H 



8- 7 



i. f 



b. B 



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b. 







A 



a. 



i 



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i 



1. 



given in Table XVI., N seeming to be an integer *. Fig. 3 

 shows, further, that « 2 and «j are nearly parallel, likewise 

 /3 U /3 3 , and 7 1? y 2 , 73. The two groups of strongest /3-lines,, 

 /?! and yS 2 , intersect one another in the case of Pb. 

 * Kydberg, Phil. Mag. xxviii. p. 144 (1914). 



