ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
The secondary electron emission, the Auger electron emission and the elastically reflected intensity have been measured simultaneously in a reflection high-energy electron diffraction (RHEED) beam rocking experiment with Pt(111). Secondary and Auger yield depend similarly on incident angle. In particular, both quantities exhibit maxima at primary beam orientations around the resonance maxima of the specular beam intensity. The corresponding primary wave field arising by diffraction in the crystal has been calculated using the dynamical theory of RHEED. It turns out that, in contrast to previous suppositions, at the resonances there is a minimum of primary electron density at the atomic sites. It is shown that the behaviour of both yields is rather a consequence of total primary electron intensity near the surface, which is enhanced at the resonances.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S010876738800491X
Permalink