Defect centers in X-irradiated alkali phosphate glasses: EPR studies

Defect centers in X-irradiated alkali phosphate glasses: EPR studies

X-irradiated samples of P 2O 5A 2WO 4A 2O (A = Li, Na) glasses were studied by electron paramagnetic resonance (EPR) at X-band (9.5 GHz). Modifications of the EPR spectra are observed following in situ the sample's temperature or after thermal annealing. The spectra analysis was carried out b...

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Veröffentlicht in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 1996, Vol.116 (1), p.145-149
Hauptverfasser: Archidi, M.E., Haddad, M., Nadiri, A., Benyaïch, F., Berger, R.
Format: Artikel
Sprache:eng
Schlagworte:
Physics
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Zusammenfassung:X-irradiated samples of P 2O 5A 2WO 4A 2O (A = Li, Na) glasses were studied by electron paramagnetic resonance (EPR) at X-band (9.5 GHz). Modifications of the EPR spectra are observed following in situ the sample's temperature or after thermal annealing. The spectra analysis was carried out by computer simulations specifically adapted for glasses in which statistical distributions are introduced for some EPR parameters. Three signals were detected: a hyperfine structure (doublet) which was assigned to a PO 4 2− center, and two anisotropic signals attributed to the peroxy radicals.
ISSN:0168-583X
1872-9584
1872-9584
0168-583X
DOI:10.1016/0168-583X(96)00026-2