Z. Hasan et al., SPECTROSCOPY OF RE3-RESOLUTION OPTICAL HOLE-BURNING AND DOUBLE-RESONANCE TECHNIQUES( CENTERS IN FLUORITE HOST USING HIGH), Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 291, 1996, pp. 209-214
Techniques of Optical Hole-burning, Optical-MW and Optical-RF Double R
esonance have been used to study Ho3+ and Pr3+ in several trigonal and
tetragonal sites in CaF2.