Abstract

We have studied two Eu³⁺ sites in CaSO₄ by selective excitation, emission, optical holeburning and optically detected nuclear magnetic resonance (ODNMR) techniques. Both centres (henceforth referred to as 1 and 2) have ⁷F₀ → ⁵D₀ excitation signals at ~578.7nm; the two absorptions are 34GHz apart. The emission and excitation spectra of the two centres are very similar, and indicate that low symmetry sites are involved.

© 1984 Optical Society of America