Secondary Electron Current as a Function of Crystal Structure

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Abstract
A summary is given of results formerly obtained which indicate that the breaks in the low voltage region of the secondary electron curve of a metal are characteristic of the arrangement of the atoms at the metal surface, and not of the structure of the atoms themselves. Further evidence in support of this view is as follows: The secondary electron curve for phosphor bronze containing 95.4 percent copper does not show the characteristics of the curve formerly obtained for copper. The curve for targets cut from a single crystal of copper is distinctly different from that previously obtained for a large number of targets taken from copper sheet. Changing the angle of incidence of a copper target from 0° to 45° causes the changes in slope to be much less prominent, and changes the relative positions of some of the breaks.