A new technique of the excited-state photoionization studies in Ce:LiYF 4 and Ce:LiLuF 4 crystals

Abstract

The new method of photodynamic processes investigations in UV active media based on the analysis of the activator ions fluorescence decay is proposed. The excited-state photoionization spectra from 5d-state of Ce 3+ ions in LiYF 4 and LiLuF 4 are determined. Photoelectrons and holes recombination and trapping cross-sections are estimated. The terminal state of excited-state photoionization is attributed to the 6s configuration of Ce 3+, located in the conduction band of the host material. © 2011 Elsevier B.V.