(1s,2p1/2) and (1s,2p3/2) resonant Raman scattering processes in Ti

G. STUTZ; L. BIANCO; G. TIRAO

Campinas

Congreso; XXI Reunión Anual de Usuarios del LNLS; 2011

Resonant inelastic scattering (RIXS) or resonant Raman scattering of x–rays is asecond order process which can be visualized as an x–ray absorption process followedby an x–ray emission one. The latter transition assumes that a radiative decaychannel takes place, whereas in the case of a non–radiative event an Auger electronis emitted. The virtual intermediate state consists of a core–hole in a deep lyingatomic shell and an electron promoted into an empty state above the Fermi level.Resonance excitation occurs when the energy of the incident photons is tuned belowor closely above the core ionization threshold.In this work we present a high resolution study of the main fingerprints of RIXSprocesses at the K–edge of Ti, namely the linear dispersion of the red–shifted Ramanline (Raman Stokes–line) and the subnatural narrowing of the RIXS peak in thevicinity of the K–ionization threshold. Special attention was put in separating thecontribution of the two Raman lines 2p3/2 !1s and 2p1/2 !1s.