Evidence for energy transfer between two distinct crystallographic europium sites in Eu(III) β″-alumina and between Eu(III) and Sm(III) in Co-doped β″-alumina
✍ Scribed by M. Laberge; D.J. Simkin; B. Dunn
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 379 KB
- Volume
- 182
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
The introduction of trivalent europium and samarium into B"-alumina yields materials in which energy transfer can be ob served, either between europium ions in the E?+doped crystal or between samarium and europium in the Co-doped species. We have identified an acceptor site in europium by monitoring its 'Dn a'F, emission, where two of the europium crystallographic sites can be distinguished. In the europium-doped species, energy is preferentially accepted by the 608. I nm component of a Beevers-Ross site at 300 K but not at 77 K. In the Eu-Sm Co-doped species, samarium to europium transfer is observed at both 300 and 77 K