Theoretical models for intensities ofd→ftransitions in electron-energy-loss spectra of rare-earth and actinide metals

1991 ◽  
Vol 44 (12) ◽  
pp. 6044-6061 ◽  
Author(s):  
Hans R. Moser ◽  
Göran Wendin
Keyword(s):  
Rare Earth ◽  
Energy Loss ◽  
Electron Energy ◽  
Theoretical Models ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

Electron Energy Loss Spectra of Rare Earth Vanadates: RVO4 (R=Sc, Y, La, Eu and Gd)

1978 ◽  
Vol 45 (5) ◽  
pp. 1684-1689 ◽  
Author(s):  
Akira Tonomura ◽  
Junji Endo ◽  
Hajime Yamamoto ◽  
Katsuhisa Usami
Keyword(s):  
Rare Earth ◽  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

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.

Calculations of Polarizabilities and Their Gradients for Electron Energy-Loss Spectroscopy

2008 ◽  
Vol 73 (11) ◽  
pp. 1509-1524 ◽  
Author(s):  
Ivana Paidarová ◽  
Roman Čurík ◽  
Stephan P. A. Sauer
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Theoretical Models ◽  
Basis Set ◽  
Polarizability Tensor ◽  
Dipole Polarizability ◽  
Perfect Agreement ◽  
Representation Method ◽  
Response Method ◽  
Electron Energy Loss

We illustrate for a set of small hydrocarbons, CH4, C2H4, C3H6 and C3H8, the important role of the electric dipole polarizability tensor and its geometric derivatives in theoretical models of electron energy-loss spectra (EELS). The coupled cluster linear response method together with Sadlej's polarized valence triple zeta basis set of atomic orbitals were used to calculate the polarizabilities and polarizability gradients. Incorporation of these ab initio data into the discrete momentum representation method (DMR) leads to perfect agreement between theory and collision experiments.

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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