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Measurements of the paramagnetic resonances in single crystals of x-irradiated germanium-doped quartz have been carried out. The g tensors have been obtained and the hyperfine structure has been partially interpreted. Two radiation-damage centers are found with similar structures. A model for the centers is suggested, consisting of an unpaired electron located on an impurity center composed of a substitutional germanium atom surrounded by four oxygen atoms with an alkali ion in an adjacent interstitial position on a twofold axis.
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Anderson et al. (1959) studied this question.
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