The optical properties of cerium-activated garnet crystals have been investigated. In the garnet crystals showing luminescence, a bright-yellow fluorescence has been observed. The fluorescence exhibits structure at low temperatures, and the wavelength maxima of the fluorescence-spectrum profiles are found to be hostdependent. Energy transfer has been observed from the cerium ion to the neodymium ion.
W. W. HOLLOWAY, JR. and M. KESTIGIAN, "Optical Properties of Cerium-Activated Garnet Crystals," J. Opt. Soc. Am. 59, 60-63 (1969)