Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 38 (1931) > Annual Issue
Document Type
Research
Abstract
When electrons are incident upon a metal surface, it is observed that electrons also leave the surface. The amount of this "secondary emission" depends upon the velocity of the incident electrons, upon the metal used as a target, and upon the previous heat treatment of the metal. The results obtained in this investigation indicate that secondary emission is very low for incident electrons of low energy; that it increases rapidly as the energy of impact is raised; that it reaches a broad maximum at a position characteristic of the metal and then declines. Metals of low work function give the highest secondary emission. Heat treatment at first increases the secondary emission at all velocities for the incident electrons and then lowers it.
Publication Date
1931
Journal Title
Proceedings of the Iowa Academy of Science
Volume
38
Issue
1
First Page
215
Last Page
215
Copyright
©1931 Iowa Academy of Science, Inc.
Language
en
File Format
application/pdf
Recommended Citation
Copeland, Paul L.
(1931)
"Secondary Emission of Electrons from Metals,"
Proceedings of the Iowa Academy of Science, 38(1), 215-215.
Available at:
https://scholarworks.uni.edu/pias/vol38/iss1/58