Naslov
Chemical effects on the Kb' and Kb2, 5 x-ray lines of titanium and its compounds

Autori
Mandić, Luka ; Fazinić, Stjepko ; Jakšić, Milko

Izvornik
Physical Review A - Atomic, Molecular, and Optical Physics (1050-2947) 80 (2009), 4; 042519-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
titanium compounds; x-ray emission; x-ray absorption; oxidation state; high-resolution; kbeta spectrum; PIXE

Sažetak
High-resolution K beta x-ray spectra induced by 2 MeV protons in thick Ti, TiO, Ti2O3, TiO2, MgTiO3, FeTiO3, TiC, TiN, and TiB2 targets were measured using a wavelength dispersive spectrometer combined with a position-sensitive detector. The intensities and energies of the K beta(2, 5) and K beta(') lines relative to the K beta(1, 3) line were extracted. The influence of self-absorption in thick targets was investigated using related x-ray-absorption near-edge-structure spectra that are available in the literature to extract mass absorption coefficients close to the K absorption edge. The correlation of the relative position of the K beta(2, 5) line with a titanium formal oxidation state in oxide compounds confirmed that the oxidation state of Ti in FeTiO3 is probably a mixture of Ti III and Ti IV states, which has been recently reported by other authors using different methods. The strengths of the K beta(2, 5) and K beta(') transition probabilities per titanium-ligand pair were found to decrease exponentially as the average titanium-ligand bond distance increased, which is similar to results obtained for various compounds with vanadium or manganese as the central 3d metal atoms.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Temeljne tehničke znanosti

POVEZANOST RADA