Bragg reflection of low-energy positrons from the surface of graphite
- 1 December 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 36 (16) , 8777-8779
- https://doi.org/10.1103/physrevb.36.8777
Abstract
We observe Bragg peaks in the elastic backscattering probability of monoenergetic positrons from the [0001] surface of highly oriented pyrolytic graphite. The position of most of the peaks can be explained by a plane spacing , slightly contracted from the bulk value and a +1.4±0.5-eV positron work function for this surface. An unexpected peak at , where is the positron momentum, could be due to multiple-scattering effects.
Keywords
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