Optical transitions in neutron-irradiatedspinel crystals
- 15 February 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 37 (5), 2645-2652
- https://doi.org/10.1103/physrevb.37.2645
Abstract
Neutron irradiation of spinel crystals produces an F-center absorption band in the uv accompanied by a broad absorption band in the visible region. Excitation and emission experiments identify the observed structure in the visible absorption band as optical transitions of transition-metal impurity ions perturbed by neighboring F centers. The perturbation of the F center increases the oscillator strengths for these transitions by more than 3 orders of magnitude. The results of these experiments suggest that the 480-nm emission band, previously attributed to the F center, is also due to a transition-metal impurity.
Keywords
This publication has 26 references indexed in Scilit:
- A study of the vacancy distribution in non-stoichiometric spinels by magic-angle spinning NMRPhilosophical Magazine A, 1986
- Thermally stimulated processes involving defects in γ- and x-irradiated spinel (MgAl2O4)Journal of Applied Physics, 1982
- Optical spectra of MgAl2O4 crystals exposed to ionizing radiationJournal of Applied Physics, 1982
- Radiation damage in MgPhysical Review B, 1980
- Effects of γ-irradiation upon the optical behavior of spinelPhysica Status Solidi (a), 1977
- Mössbauer hyperfine spectra of dilute Fe3+ in synthetic MgAl2O4 spinelJournal of Physics and Chemistry of Solids, 1976
- Hyperfine splitting of 57Fe3+ Mössbauer spectra in diamagnetic host latticesJournal of Solid State Chemistry, 1973
- A direct determination of cation disorder in MgAl2O4 spinel by ESRPhysics Letters A, 1972
- Charge-Transfer Spectra of Transition-Metal Ions in CorundumPhysical Review B, 1970
- Subsolidus Reactions in Oxide Systems in the Presence of Water at High PressuresJournal of the American Ceramic Society, 1953