NO32- centers in synthetic hydroxyapatite

• Published in: Physics of the solid state Vol. 52; no. 11; pp. 2364 - 2368
• Main Authors: Vorona, I. P., Ishchenko, S. S., Baran, N. P., Rudko, V. V., Zatovskiĭ, I. V., Gorodilova, N. A., Povarchuk, V. Yu
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01.11.2010
• Subjects: Defects and Impurity Centers; Dislocations; Physics; Physics and Astronomy; Physics of Strength; Solid State Physics; Hydroxyapatite; Electron Paramag Netic Resonance Signal; Hyperfine Interaction; Electron Paramag Netic Resonance Spectrum; Electron Paramag Netic Resonance
• ISSN: 1063-7834; 1090-6460
• DOI: 10.1134/S1063783410110235

The structure and properties of NO 3 2− paramagnetic complexes formed by γ-rays and UV irradiation in synthetic hydroxyapatite have been investigated using EPR spectroscopy. The formation of NO 3 2− centers under UV irradiation has been revealed for the first time. It has been found that NO 3 2− complexes in synthetic hydroxyapatite form two types of paramagnetic centers. Models of the centers have been proposed, their EPR spectroscopy parameters have been determined, and the influence of thermal annealing has been investigated. As the microwave power increases, the inversion of the EPR spectra has been observed.