Anion interstitials in neutron-irradiated MgO single crystals

Electron paramagnetic resonance (EPR) and high-temperature (300–775 K) thermoluminescence of neutron-irradiated MgO single crystals were studied. Spin-hamiltonian parameters of the observed anion interstitial centres (O 2 − molecular ion in an oxygen site by a cation vacancy—H centre) were determine...

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Bibliographic Details
Published in:Radiation measurements 2001-10, Vol.33 (5), p.625-628
Main Authors: Kärner, T., Dolgov, S., Mironova-Ulmane, N., Nakonechnyi, S., Vasil'chenko, E.
Format: Article
Language:English
Subjects:
Anion interstitial
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geochronology
Isotope geochemistry. Geochronology
Radiation defects
Simple oxide
Thermoluminescence
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Summary:Electron paramagnetic resonance (EPR) and high-temperature (300–775 K) thermoluminescence of neutron-irradiated MgO single crystals were studied. Spin-hamiltonian parameters of the observed anion interstitial centres (O 2 − molecular ion in an oxygen site by a cation vacancy—H centre) were determined. The thermal stability of anion interstitials (H centres) and other EPR-active centres was investigated. It is shown that the thermal decay of H centres is attended by a TL peak due to hole recombination luminescence at 700 K. A possible mechanism for the thermal destruction of anion Frenkel defects in MgO is discussed.
ISSN:1350-4487
1879-0925
DOI:10.1016/S1350-4487(01)00071-3