On the Correspondence of the Experimental EEL Spectra with the Electron Structure of Tungsten

• Authors: J. Czyżewski , J. Krajniak , S. Klein
• Languages of publication: EN

Abstracts

EN

In the previous paper [7] we have directly compared the experimental Electron Energy Loss (EEL) spectra with both the theoretical bulk density-of-states (BDOS) and surface density-of-states (SDOS) functions for tungsten. On the base of the ILEED intensity calculations we have estimated to what extend an EEL spectrum measured at some value of the primary electron energy E_{p}, should correspond either to the SDOS or to the BDOS. Also, the angular acceptance of a CMA has been used to separate the EEL spectra measured as a function of E_{p} which corresponded either to the [001] direction or to the [011] in parallel to the studied (001) surface. In the present paper we propose a procedure which combines the Electron Energy Loss Spectra (EELS) simulation method based on Bauer's theory [1,2] and the inelastic low energy diffraction (ILEED). If the standard simulation procedure is applied for tungsten an ambiguity would arise because the DOS function is very anisotropic and varies as a function of both the direction along the surface and the depth considered within several atomic layers. The application of ILEED has supplemented the simulation procedure with the method which identifies both the correspondence of a reciprocal-lattice vector to a measured EEL spectrum and the localization of a studied electron structure with regard to the distance from the surface.

Keywords

EN

79.20.Fv; 61.80.Mk; 82.65.-i

Discipline

• 79.20.Fv: Electron impact: Auger emission(for Auger electron spectroscopy, see 82.80.Pv)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1992
• Volume: 81
• Issue: 1
• Pages: 67-72

Dates

published

1992-01

received

1991-05-21

Contributors

author

J. Czyżewski

• Institute of Experimental Physics, University of Wrocław, Cybulskiego 36, 50-205 Wrocław, Poland

author

J. Krajniak

• Institute of Experimental Physics, University of Wrocław, Cybulskiego 36, 50-205 Wrocław, Poland

author

S. Klein

• Institute of Experimental Physics, University of Wrocław, Cybulskiego 36, 50-205 Wrocław, Poland

Identifiers

DOI

10.12693/APhysPolA.81.67