REICHE, F. (+) A. SMEKAL.

Zur Theorie der Röntgenspektren.

Leipzig, Ambrosius Barth, 1918. 8vo. In full black cloth with gilt lettering to spine. In "Annalen der Physik", Vierte Folge, Band 57. Entire volume offered. Library labels to front end papers and stamp to title page, otherwise fine and clean. Pp. 124-144. [Entire volume: (1), 632, VIII pp.].

First printing of Reiche and Smekal's important paper in which they presented their theory of the x-ray spectra

"The year and a half in Berlin (1917-1919) was extremely important for Smekal's scientific development and subsequent research. There he took up the quantum, the Bohr theory, and the problem of X-ray spectra. After delivering a crushing blow to the faltering Sommerfeld-Debye theory, which deduced X-ray spectra from hypothetical intra-atomic mechanisms, Smekal, in competition with Dirk Coster and Gregor Wentzel, induced from the experimental data the number, arrangement, and allowed transitions between the atomic energy levels resulting in X-ray spectral lines." (DSB)

Order-nr.: 50372