DEBYE, P. - THE DEBYE-FACTOR ANNOUNCED.

Interferenz von Röntgenstrahlen und Wärmebewegung.

Leipzig, Johann Ambrosius Barth, 1914. No wrappers. In: "Annalen der Physik. Vierte Folge. Hrsg. von W. Wien und M. Planck.", Bd. 43. (Heft 1), No 1,1914. The entire issue offered. The block is punched in inner margins after cords.Titlepage to vol. 43. Small stamp at foot of titlepage. Pp. 1-168. Debye's paper: pp. 49-95.

First appearance of this importent paper in which Debye announced his discovery of the so-called Debye-factor, later extended by Ivar Waller (1924) and then named the Debye-Waller factor.

"The Debye-Waller factor (DWF), named after Peter Debye and Ivar Waller, is used in condensed matter physics to describe the attenuation of x-ray scattering or coherent neutron scattering caused by thermal motion. It has also been called the B factor or the temperature factor. Often, "Debye-Waller factor" is used as a generic term that comprises the Lamb-Mössbauer factor of incoherent neutron scattering and Mössbauer spectroscopy."

"Within a year of the discovery of X-ray diffraction by crystals by von Laue and the Braggs in 1912. Debye published three papers proving that the thermal movement of the atom in the crystal affected the X-ray interferences. Here he was examining from a different point of view the atomic lattice treated in his specific heat work. Late in 1913 he sent in for publication a long paper (the paper offered) deriving a factor now called the Debye factor, which gave the decrease of intensity of the diffration spotss as a function of wavelenght, diffraction angle, and absolute temperature."(DSB III, p. 619.

Order-nr.: 43816