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Nexafs study of the O2-Yb-Si(111) nanofilm system
Russian version
Kuzmin M. V. 1, Remele V. E. 1, Sorokina S. V. 1, Chumakov R. G.
1Ioffe Institute, St. Petersburg, Russia
Email: m.kuzmin@mail.ioffe.ru
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The near-edge X-ray absorption fine structure of the adsorbed oxygen layer on the ytterbium nanofilm has been studied. It is shown that oxygen is chemisorbed in the form that is close to singly charged O2- ions. The O-O bond length in such ions is determined (1.33 Angstrem). X-ray dichroism of chemisorbed molecules is detected. It is due to the orientation of intramolecular σ* orbitals predominantly along the normal to the ytterbium surface. Keywords: X-ray absorption, near-edge fine structure, nanoadsorbent, chemisorption, oxygen, ytterbium.
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