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POINT DEFECTS IN PbF2 A SUPERIONIC CONDUCTOR
DEFECT CHEMISTRY IN CdFEu
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15/2 transition activation energy activity coefficients alkaline earth fluoride anion annealed at 550°C annealing temperature as-received associated pair cadmium fluoride capsule Cd metal CdF2 crystals CdF2:Eu Changes in relative cluster sites CM CM CM concentration increases crystal annealed crystal field cubic site decrease defect equilibria dielectric relaxation dimer dissociated distribution dopant concentration dye laser electrons energy transfer processes Er3+ crystals excitation and fluorescence excitation spectra excitation spectrum monitoring F-j transition fluorescence spectra fluorescence spectrum exciting fluorescence transient fluoride interstitial gated detection heat higher temperatures insulating intensity interactions interstitial fluoride ions ion sites lattice lifetimes long delay manifold monitoring fluorescence msec observed oxygen compensated pair sites PbF2 PbF2:Er peaks phonon quenched rare earth ions ratio relative site concentration scavenging semiconducting semiconducting crystals shown in Figure site excitation sites is monitored spectroscopy superionic superionic transition transition temperature vacancies vacuum Vycor ysec