Abstract
Site selective fluorescence spectroscopy of a crystal of europium gallium garnet containing Cr3+ as an impurity has been carried out. An analysis of the experimental results reveals that the strongest fluorescence spectrum between 590.0 nm and 620.0 nm is due to emission from an Eu3+−Cr3+ pair. Fluorescences of farther removed pairs and that of Eu3+ occupying the 8-coordinated d site and 6-coordinated Ga3+ site are also assigned. Energy transfer between the various sites occurs while the excitation spectra for the R lines of Cr3+ show that extremely fast transfer takes place between the R2 and R1 levels.
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