A Caltech Library Service

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

Watson, E. C. (1928) The Space-Distribution of the Photo-Electrons Ejected by X-Rays. Physical Review, 31 (5). pp. 728-741. ISSN 0031-899X. doi:10.1103/PhysRev.31.728.

See Usage Policy.


Use this Persistent URL to link to this item:


None of the theories which have heretofore been proposed to account for the apparent emission of x-ray electrons from the atom over a wide range of angles instead of in one definite direction is entirely satisfactory. Since the scattering of the electrons which takes place in neighboring atoms has not been completely eliminated in any of the experimental work, the Rutherford theory of nuclear scattering is applied to the problem. This theory together with the assumption that the electrons all start out from the parent-atom in the same direction can be made to explain in a satisfactory way all the details of the observed space-distribution. It gives the amount of the spread quantitatively; it gives the form of the distribution curves; it explains the difference between the lateral and longitudinal distributions; it explains the dependence of the amount of the spread upon the nature of the atoms from which the electrons are ejected and the frequency of the x-rays which do the ejecting; and it accounts for the disagreement among various observers regarding this dependence. Incidentally it is pointed out that the scattering of 17 kv electrons by hydrogen nuclei is many times greater than can be accounted for on the classical theory.

Item Type:Article
Related URLs:
URLURL TypeDescription
Additional Information:©1928 The American Physical Society This paper would have been impossible if the writer had not had free access to the important experimental results of Dr. D. H. Loughridge and Mr. C. D. Anderson before they were published and he desires to express his sincere thanks to them both for putting these results completely at his disposal and for freely discussing with him many of the details of the work. The constructive criticism of Dr. I. S. Bowen also played an important part in the paper and the writer gratefully acknowledges his help.
Issue or Number:5
Record Number:CaltechAUTHORS:WATpr28
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1551
Deposited By: Archive Administrator
Deposited On:28 Jan 2006
Last Modified:08 Nov 2021 19:11

Repository Staff Only: item control page