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Electronic excitations in the transition metals V, Zr, Nb, Mo, and Ta
Auteur(s)
Cornaz, A.
Erbudak, M.
Aebi, Philipp
Stucki, F.
Vanini, F.
Date de parution
1987
In
Physical Review B, American Physical Society (APS), 1987/35/7/3062-3068
Résumé
The np core-loss spectra and the associated deexcitation processes for the transition metals V (<i>n=3</i>), Zr, Nb, Mo (<i>n=4</i>), and Ta (<i>n=5</i>) have been studied in low-energy electron scattering experiments in order to investigate the dependence of their nature on the principle quantum number <i>n</i>. For the metals with <i>n=3</i> and <i>n=4</i>, the measurements are accounted for in terms of atomic transitions involving the excitation and the decay of localized <i>d</i> electrons. The observations on V can qualitatively be compared with published computations for isolated atoms. While the <i>5p</i> core excitations for Ta resemble the gross features of the unoccupied d-band density of states, the decay processes involve, besides the conventional O<sub>2</sub>VV and O<sub>3</sub>VV Auger transitions, autoionization emission related to 5<i>p<sup>6</sup></i>5<i>d<sup>N</sup></i>-5<i>p<sup>5</sup></i>5<i>d<sup>N+1</sup></i>-5<i>p<sup>6</sup></i>5<i>d<sup>N-1</sup></i>+ε<i>f</i> transitions.
Identifiants
Type de publication
journal article
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