Time-resolved luminescence of LaBr3-Ce scintillation crystals upon selective UV-VUV-XUV excitation

Abstract

The time-resolved photoluminescence (PL) of LaBr3-Ce scintillation spectrometric crystals produced in Russia is measured upon excitation using synchrotron radiation with photon energies of 3.7-21 and 45-290 eV at temperatures of 295 and 7.5 K. The PL spectra and decay curves are measured for excitation in the transparency range, at the edge of fundamental absorption, at the interband transitions, and in the range of inner-shell absorption. It is demonstrated that the PL yield is not proportional to the excitation energy, and that the PL decay curves are modified in the range of photoionization of the 3d (Br) and 4d (La) inner shells and, especially, in the range of giant resonance. © 2013 Allerton Press, Inc.