Electron Energy Loss Spectra Showing the Effects of Surface Roughness and Electromagnetic Retardation–Theory and Experiment

2001 ◽  
Vol 70 (7) ◽  
pp. 2012-2018 ◽  
Author(s):  
Yoichi Uehara ◽  
Yoshihide Suzuki ◽  
Hiroshi Komagata ◽  
Tohru Tsuruoka ◽  
Sukekatsu Ushioda
Keyword(s):  
Surface Roughness ◽  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra ◽  
Theory And Experiment

Parallel Detection of Electron Energy Loss Spectra in Direct Mode

1990 ◽  
Vol 48 (2) ◽  
pp. 82-83
Author(s):  
Eckhard Quandt ◽  
Stephan laBarré ◽  
Andreas Hartmann ◽  
Heinz Niedrig
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Energy Resolution ◽  
Large Angle ◽  
Maximum Energy ◽  
Semiconductor Detectors ◽  
Parallel Detection ◽  
Photodiode Arrays ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

Due to the development of semiconductor detectors with high spatial resolution -- e.g. charge coupled devices (CCDs) or photodiode arrays (PDAs) -- the parallel detection of electron energy loss spectra (EELS) has become an important alternative to serial registration. Using parallel detection for recording of energy spectroscopic large angle convergent beam patterns (LACBPs) special selected scattering vectors and small detection apertures lead to very low intensities. Therefore the very sensitive direct irradiation of a cooled linear PDA instead of the common combination of scintillator, fibre optic, and semiconductor has been investigated. In order to obtain a sufficient energy resolution the spectra are optionally magnified by a quadrupole-lens system.The detector used is a Hamamatsu S2304-512Q linear PDA with 512 diodes and removed quartz-glas window. The sensor size is 13 μm ∗ 2.5 mm with an element spacing of 25 μm. Along with the dispersion of 3.5 μm/eV at 40 keV the maximum energy resolution is limited to about 7 eV, so that a magnification system should be attached for experiments requiring a better resolution.

Electron energy loss spectra of a Pd(110) clean surface

1986 ◽  
Vol 58 (1) ◽  
pp. 75-77 ◽  
Author(s):  
M. Nishijima ◽  
M. Jo ◽  
Y. Kuwahara ◽  
M. Onchi
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Clean Surface ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra
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