266 Dr. L. Vegard on the X-Ray Spectra 



It appears from the table that the agreement is remarkably 

 good, and in fact the best hitherto obtained. Fig. 4 repre- 

 sents the curves A=/(N) corresponding to calculated and 



Fio-. i. 



-N 



t 



^ 70 - 

 80 

 90 - 

 100 

 HO - 

 J20 - 

 130 



I Theoretical curve (recomb. from secondaries 

 If Experimental curi/e 



observed values. A comparison with fig. 2 shows that the 

 theoretical curve of fig. 4 gives a better agreement than any 

 of those in fig. 2. 



L,. 



In the case of the second line (Lp) of the L-radiation we are 

 on less certain ground. 



First of all there may be some doubt as to which of the 

 /3-lines of Siegbahn we might take as the one which is 

 produced by recombination from t = 4 to the circular L-ring. 

 As before, we take the fii line of Siegbahn to be produced l.y 

 recombination from t=3 to an elliptic state of the L-ring. 

 But still we shall have the choice between /3 2 and /3 3 

 (Sommerfeld, y (/>). As before, we shall consider /3 2 as the 

 second L-line and indicate it by L^. 



