The Space-Distribution of the Photo-Electrons Ejected by X-Rays

摘要

The experiments of Wilson, Auger, Bothe, Bubb, Loughridge andudKirchner by the C. T. R. Wilson cloud expansion-chamber method haveudshown that while the most probable direction of the photo-electron tracksudin a gas traversed by X-rays is nearly the direction of the electric vectorudof the incident radiation, there is apparently a very considerable "spread"udin the direction of the tracks. Magnetic spectra of the electrons ejectedudfrom very thin metallic films at various angles show similar effects.udTheories to account for this apparent emission from the atom over audwide range of angles instead of in one definite direction have been givenudby Bubb, Bothe, Auger and Perrin, Wentzel and Beck, but noneudof them is satisfactory in explaining all the now known experimentaludfacts. The purpose of this paper is to point out that nuclear scatteringudof the sort postulated by Rutherford with such brilliant success in theudcase of α-particles has not been sufficiently considered in this connectionudand that it probably will account for the whole effect.