X-ray excited optical luminescence of Ce-doped BaAl2O4

The luminescence properties of Ce3+ in BaAl2O4 are reported. The results of simultaneous measurements of XEOL and XAS in the X-ray energy range that includes the Ba L-II,L-III-edges and Ce L-III edge are shown. The XEOL yield increases as the energy of the photons increases. The radioluminescence spectra, taken from 200 to 1100 nm, showed broad emission bands corresponding to 5d(1) -> F-2(5/2), F-2(7/2) transitions of Ce3+ when incorporated into two nonequivalent Ba sites. The lifetime of the light emission was also measured using the single bunch operation mode at the Brazilian National Synchrotron Laboratory (LNLS), and BaAl2O4:Ce3+ showed single exponential decay time component of about 44.3 ns. (C) 2011 Elsevier B.V. All rights reserved.