Exciton Dynamics and Host Sensitized Energy Transfer in Inorganic Crystals.
Abstract
Tunable dye laser spectroscopy was used to study energy transfer processes in CaWO4:Sm(3+) crystals. Fluorescence and excitation transitions for samarium ions in different crystal field sites in calcium tungstate were identified and used to study energy migration among samarium ions as a function of temperature, samarium concentration, time after the laser pulse, and pressure. The interaction mechanism causing energy migration is identified as electric quadrupole-quadrupole. At low temperatures only single step transfer between nearby ions takes place while at high temperatures multistep diffusion occurs efficiently.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1975
- Accession Number
- ADA017559
Entities
People
- Chang Hsu
- George C. Powell
- George E. Venikouas
Organizations
- Oklahoma State University–Stillwater