Resumo

PAREDES MELLONE, O.A; CEPPI, S.A; ARNEODO LAROCHETTE, P.P  e  STUTZ, G.E. Li K-shell electron excitation at low momentum transfer by inelastic X ray scattering in LiH. An. AFA [online]. 2015, vol.26, n.2, pp.93-97. ISSN 0327-358X.

A study of the excitation spectrum of core electrons of Li in LiH using high resolution inelastic x-ray scattering is presented. The core electron contribution is extracted from the whole excitation spectrum and the analysis is accomplished by means of ab initio simulations. The near edge fine structure of the spectrum is interpreted in terms of the excitation channels allowed for the momentum transfer value, and the symmetry projected density of states. Core-hole effects were found to be appreciable. The main contribution to the spectrum is associated to dipole transitions to empty p-states. A Li K edge chemical shift of 2.2eV to higher energies is observed relative to that of metallic Li.

Palavras-chave : Inelastic x-ray scattering; Li K edge; Fine structure.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )