New Experimental Results Concerning the Doublet K₁

Abstract

IN a paper recently published (Z. f. Phys. 33, 601, 1925) the present authors came to the conclusion that the new line βá constitutes with the line β₁ the “relativity doublet”. In a letter received by the authors, Prof. Sommerfeld points out that, in his opinion, the line ought to be considered as a spark line or as a line of unknown origin, since according to our data is equal to 4.3 X.U., whilst according to Allison's for M₀ is equal to 0.56 X.U. The value given by Allison may be verified with the aid of the data for the wave-lengths L₃ and L₄ which are emitted, when the transition of electrons takes place between the levels M₃ or M₄ and the level L₃, while the transition of electrons from the same levels M₃ and M₄ to the level K gives rise to the lines K₁ and K. Accordingly we obtain for "/R from the data for the L series for M₀ the value 1.63, and from Allison's data 1.27.