Abstract

The effects of radiation on rare earth doped calcium fluoride have been the subject of a number of investigations in the past two decades. Merz and Pershan^1,2 have shown that these materials undergo a charge conversion of RE³⁺→RE²⁺ when subjected to gamma or x-ray radiation at low temperature. The fluorescence spectra of Sm²⁺ in CaF₂ has been examined using optical excitation³ and Sm³⁺ has been observed in x-irradiated CaF₂.^1,2

© 1984 Optical Society of America