ISSN:
1434-601X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Absolute intensities of electrons scattered elastically in a polycrystalline aluminium foil were measured by means of a retarding field apparatus at 51 kev and in the temperature range 150–800 °K. From the integrated intensities of the Debye-Scherrer rings (I R), of the temperature diffuse scattering (I TDS) and of the temperature independent diffuse scattering (I DS) the total cross sections σ of the foil for the corresponding scattering processes have been determined. The measured values σ R (T) for Laue-Bragg scattering show very good agreement with the calculation, based on the dynamical two beam approximation, and σ TDS (T) for the temperature diffuse scattering agrees fairly well with the kinematical value for the Einstein model of the vibrating crystal. The temperature independent part of the elastic background intensity is mainly due to elastic scattering of electrons in the amorphous oxide layer of the aluminium foil. It turns out, that the sum of all cross sections for the elastic scattering processes mentioned increases slightly with temperature.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01339400
