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- W2166650307 abstract "Magnetic resonance measurements on crystalline quartz doped with germanium indicate E'1 andE'2 trapped electron centers can be produced by low energy ionizing radiation (50 kVp X-rays). Most of these vacancy-related centers are associated with substitutional Ge impurities rather than Si host cations. Analyses of detailed spectroscopic data in terms of non-bonding s-p hybrid orbitals formed from atomic Si or Ge orbitals, as appropriate, effectively account for the basic paramagnetic responses. Two distinct but quite similar EPR spectra of the E'1-type associated with Ge impurities are observed, each characteristic of a specific treatment (X-irradiation and heating). A single-oxygen-vacancy E-defect model for E' center geometry is proposed. The model is based on the spectroscopic data and experimental results on generation and bleaching of paramagnetic vacancy centers in α-SiO2:Ge. The various E'1 and E'2-type magnetic centers are pictured as modifications of this basic E defect. These result from interposition of common impurities (hydrogen in particular) and trapping of electrons or holes." @default.
- W2166650307 created "2016-06-24" @default.
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- W2166650307 date "1970-04-01" @default.
- W2166650307 modified "2023-10-04" @default.
- W2166650307 title "Defects in crystalline quartz: Electron paramagnetic resonance of E' vacancy centers associated with germanium impurities" @default.
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- W2166650307 doi "https://doi.org/10.1016/0022-3697(70)90192-7" @default.
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