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



the L-system. Jnst as in the case of the K^-line, we 

 have : 



and for recombination to the elliptic state : 



(&.-(&.+(& <23i) 



In Tahle XIV. are given the calculated values of 



( r> ) 5 ( n ) 5 ( tS I j an( l the observed values of { ^ ) . 

 \K' La V-tv 7 M a \1Vl v \K/l v 



The frequency of M a is calculated from the combination 

 #3 = 8, (7 4 =7, both with quant-number 3, and ^5= 10 (quant- 

 number 4). 



Table XIV. 







v^uiuuuueu 





Observed. 



(e)l; 



287-3 ' 



D. 

 - 6-5 





N. 

 50 



245-3 



35-5 



(ft; 



280-8 



P. 



-2-3 



60 



378-4 



66-8 



445-2 



448-0 



- 2-8 



-0-6 



70 



541-5 



107-8 



649-3 



6440 



+ 5-3 



4-0-8 



80 



735-3 



158-7 



894-0 



874-5 



4-19-5 



+ 2-2 



90 



961-3 



221-2 



1182-5 



1143 



+39-5 



4-3-5 



The agreement is seen to be remarkably good, and thus 

 we see by comparison with Paper I. that also in the case 

 of the L-series the assumption of recombination between 

 primaries gives a better agreement for the second line 

 of the series than the hypothesis of recombination from 

 secondaries in the form in which this hypothesis was taken 

 in my previous paper. 



In this way we have succeeded in giving a fairly satis- 

 factory explanation of the two doublets (a/3) and (7 5). 

 If our interpretation is right, they should — in analogy with 

 the K-series — rather be called (« "i) (A> &)• 



With regard to the /-series, we have seen that the 

 assumption of recombination between primaries is not 

 consistent with the explanation previously given to the 

 Z-series ; but this fact alone must not be considered as 

 fatal to the assumption of recombination between primaries. 

 Further investigations may show us new possibilities for the 

 production of lines ; so, e. g., it is not excluded that a ring- 

 system, besides the circular and elliptic state, may take up 

 some third state. 



