Titlebook: Optical Properties of Ions in Solids; Baldassare Bartolo Book 1975 Springer Science+Business Media New York 1975 crystal.dispersion.electr

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The Role of the Jahn-Teller Effect in the Optical Spectra of Ions in Solids,cuss the broad-band optical spectra which can occur. The vibronic level structure for electronically degenerate states is then discussed employing correlation diagrams and evidence of this structure is cited from selected optical spectra.

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Zero-Phonon and Phonon-Assisted Radiative Transitions of Donor-Acceptor Pairs in Luminescent Semicoransitions is formulated. The theory including configuration interaction and effects of lattice polarization is formulated for symmetrical pairs which have equal electron and positive hole orbital radii, and applied to the spectrum of gallium phosphide doped with tin and zinc.

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Absorption and Emission Spectra,way if suitable hypotheses are accepted. There is also a discussion of some experimental results: large band spectra in II-VI compounds (the case of ZnS:Mn is specially examined), edge emission in CdS and R-line emission of ruby.

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Quantum theory of Lattice Vibrations,n; this includes a discussion of the so-called Van Hove singularities, and a cataloguing of the types of singularities involved. Finally, the lattice vibrational equation of state is formulated, and the effects of the boundary conditions on the frequency distribution are discussed.

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Fundamentals of Radiative Transitions of Ions and of Ion Pairs in Solids,magnetic radiative transitions are determined. These transitions are related to the Einstein induced and spontaneous transition probabilities. Cooperative phenomena at high radiation densities are noted. Finally, the effects of irreversible phonon relaxation processes are considered.

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Luminescence and Spectroscopy of Small Molecular Ions in Crystals,mpurity, etc.). In the present paper the following problems are discussed: (1) features of the spectra of the centres formed by small molecular ions; (2) rotation and libration of the impurity ion N.; (3) luminescence study of the kinetics of the reorientation of the impurity ion S. in the KI crystal.

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Relaxation and Energy Transfer,resting aspects of the range dependence examined. Short range transfer forces (e.g., exchange) are discussed, and critical concentrations for energy transport in inhomogeneously broadened systems derived. The relationship between this effect and degradation of fluorescent efficiency is discussed.

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