1920. No. 2. 



ON THE X-RAY SPECTRA. 



17 



Table \'II. 



h cal. Si obs. 



li Jobs. 



The assumption 70 = 12 gives the best agreement for small, while 

 <l^ = 8 is the better for heigh atomic numbers. As we schall see later 

 on the frequensies of K ^ are in favour of the assumption ry.j = 8. 



C. On the Possibility of two L-systems. 



In the Paper I. I was led to assume a second L-ring of 8 electrons. 

 Building on the assumption of recombination from secondaries I was 

 able by means of this assumption to indicate an explanation of the 

 ^-series. Now it would be of interest to see how far the assumption of 

 two />-systems is consistent with our present hypothesis with regard to 

 the process of recombination, and how far this hypothesis is able to 

 to yield any satisfactory explanation of the /-series. 



In this case we must apply equation (lo) because the recombination 

 does not take place between successive rings. 



Putting in equation (lo) 



/ = 2, /.• = 4, >?2 -- 2, ;?3 =- 2, //4 = 3, 2^2 = 3 

 Pi = 3 + 72. Pi = ô-\- 'h + 73 



the e(|uation of condition takes the form : 



(^(74) — 74 = /"(72)+ \ 73 

 4 



where /'(72) is the same function as in equation (13). 



Vid. Selsk. Skrifter. I. M.N. Kl. rçao. No. a. 



M) 



