Spectroscopic Evidence of J-Transformation of X-rays

Abstract

IN our letter to NATURE of April 25 on spectroscopic evidence of J-transformation of X-rays, we pointed out that there are alternative conclusions regarding the experimental results which were taken from the Table V. given by Prof. Siegbahn in “Über die Röntgenspektren der chemischen Elemente,” Jahrbuch der Radioaktivität, 1916. These conclusions are: either the wave-length determinations quoted are inaccurate to the extent of more than 1 per cent., or the discontinuities which occur in K₁, K₂, K are real and are due to J-transformation of X-rays. Prof. Siegbahn gives as his judgment that the irregularities are due to experimental error: we accept this.