Infrared spectroscopy of LuAlO3:Ce a useful tool to determine Ce concentration

Infrared spectra of monocrystalline samples of LuAlO3:Ce with different Ce content are presented. The origins of the observed transitions between Stark levels of the F-2(5/2) and F-2(7/2) states are identified, and the split of the two lowest components of the F-2(5/2) state is estimated as 120 cm(-1). Three of the transitions are shown to be useful to monitor cerium content in the specimens since their absorption intensities obey the Beer-Lambert law. This convenient and reliable method can be used in the material optimization procedure to improve its scintillation performance, significantly reducing the cost and time of the needed analysis. (C) 1998 Elsevier Science B.V. All rights reserved.