论文信息 - Nonradiative decay from 5d states of rare earths in crystals

Nonradiative decay from 5d states of rare earths in crystals

Abstract Nonradiative decay from 4fn−1 5d states was investigated for trivalent rare earths in Y3Al5O12. The rates of both 5d→4f and 5d→5d transitions were determined from measurements of the lifetimes and intensities of 5d fluorescence from Ce3+ and Pr3+. Because of the stronger ion-lattice coupling, nonradiative decay rates for transitions involving 5d states are much faster than those between 4f states. Decay rates are dependent upon the temperature and the energy gap to the next-lower level. The temperature dependences of the 5d fluorescence lifetimes from 77 to 700°K are reported.

M. J. Weber | M. Weber

[1] E. Loh. 4fn-->4fn-15d Spectra of Rare-Earth Ions in Crystals , 1968 .

[2] W. Fowler,et al. Relation between Absorption and Emission Probabilities in Luminescent Centers in Ionic Solids , 1962 .

[3] E. Loh. Lowest 4 f → 5 d Transition of Trivalent Rare-Earth Ions in Ca F 2 Crystals , 1966 .

[4] G. Blasse,et al. Investigation of Some Ce3+‐Activated Phosphors , 1967 .

[5] G. A. Slack,et al. Optical Absorption of Y 3 Al 5 O 12 from 10- to 55 000- cm − 1 Wave Numbers , 1969 .

[6] M. Weber,et al. Spectrum and anomalous temperature dependence of the 2E → 4A2 emission of Y3Al5O12: Mn4+☆ , 1971 .

[7] W. Fowler,et al. Detailed Balance in Optical Transitions in Molecules and Solids , 1965 .

[8] H. Warren Moos,et al. Spectroscopic relaxation processes of rare earth ions in crystals , 1970 .

[9] D. McClure,et al. Survey of the Spectra of the Divalent Rare‐Earth Ions in Cubic Crystals , 1963 .

[10] P. Kisliuk,et al. Radiation from the T 2 4 State of Cr 3 + in Ruby and Emerald , 1967 .

[11] G. Blasse,et al. A NEW PHOSPHOR FOR FLYING‐SPOT CATHODE‐RAY TUBES FOR COLOR TELEVISION: YELLOW‐EMITTING Y3Al5O12–Ce3+ , 1967 .