Structural relaxation of E-gamma(') centers in amorphous silica

Article

关键词: E' CENTER;    OXYGEN VACANCY;    GAMMA-IRRADIATION;    CRYSTALLINE SIO2;    DEFECTS;    QUARTZ;    MODEL;    RADIATION;    CREATION;    GLASSES;   

DOI  :  10.1103/PhysRevB.66.113201

来源: SCIE

【 摘 要 】

We report experimental evidence of the existence of two variants of the E-gamma(') centers induced in silica by gamma rays at room temperature. The two variants are distinguishable by the fine features of their line shapes in paramagnetic resonance spectra. These features suggest that the two E-gamma(') differ in their topology. We find a thermally induced interconversion between the centers with an activation energy of about 34 meV. Hints are also found for the existence of a structural configuration of minimum energy and of a metastable state.

【 授权许可】

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