COLOR-CENTERS IN LIBAF3 CRYSTALS

The origin of the absorption bands in LiBaF3 created by X-ray irradiat ion at RT has been investigated. It is found that three absorption ban ds at 270, 320 and 430 nm represent different electron transitions wit hin a radiation defect effectively created in LiBaF3 single crystals. Following the Mollwo-Ivey relation we discuss investigations of optica l dichroism, magnetic optical dichroism, as well as the assumptions re garding the accumulation kinetics of these absorption bands, the F cen tre being the main radiation defect created by X-rays in undoped LiBaF 3 crystals at RT. (C) 1998 Elsevier Science Ltd. All rights reserved.