Electron Spin Resonance Studies of Gamma-Irradiated Glasses Containing Lead

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Abstract
Electron spin resonance (ESR) studies have been made of lead borate and lead silicate glasses gamma irradiated and maintained at liquid‐nitrogen temperature. In lead borate glasses of low PbO content, a spectrum similar to the five‐line spectrum which has been observed in alkali borate glasses was observed, while a different, asymmetric spectrum appeared in glasses of high lead oxide content. This latter spectrum is identified as due to the O− center near one or more Pb++ ions.