extended energy-loss fine structure, EXELFS
extended energy-loss fine structure
A fine structure appearing in an energy region of about 40 to 200 eV above the absorption-edge energy in the EELS core-loss spectrum. This structure is called "extended energy-loss fine structure (EXELFS)." The EXELFS is produced due to the scattering of electrons, which are excited from the inner-shell state to the conduction band (unoccupied state), by the adjacent atoms. When the EXELFS spectrum is Fourier-transformed, information on local atomic arrangements is obtained. EXELFS corresponds to EXAFS in X-ray spectroscopy.
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