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- W4247707004 abstract "The theory of X-ray absorption and emission at electron transitions from the inner 2p, 4d shells is developed for the systems with intermediate valency when the coupling energy of the f level turns out to be comparable with Fermi energy and the wavefunction of the ground state is a quantum superposition of states of different configurations of f electrons, . It is shown that due to different screening of a localized hole by electron in various electron configurations 4fn and 4fn–1s, the absorption spectrum contains two well resolved sharp peaks with relative intensities 1 – nf and nf. The effect of the hole finite lifetime results in partial smearing of the spectrum and gives rise to two Lorentz maxima observed experimentally in the absorption LIII, MIV, Mv spectra near the absorption edge (XANES) in a whole series of compounds with intermediate valency on the basis of Ce, Sm, Tm, Eu. The theory also explains qualitatively correctly the character of variation of SmSe absorption spectrum under pressure." @default.
- W4247707004 created "2022-05-12" @default.
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- W4247707004 date "1987-01-01" @default.
- W4247707004 modified "2023-09-28" @default.
- W4247707004 title "X-RAY ABSORPTION SPECTRA THEORY IN VARIABLE VALENCY COMPOUNDS" @default.
- W4247707004 doi "https://doi.org/10.1016/b978-1-4832-2948-5.50147-7" @default.
- W4247707004 hasPublicationYear "1987" @default.
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