EPR spectra of lead(3+) and silver(0) in glass

EPR spectra of Pb/sup 3 +/, singlet and doublet absorptions associated with nonmagnetic and magnetic Pb nuclei, respectively, were observed for ..gamma..-irradiated phosphate glasses. The expression for the line shape of Pb/sup 3 +/, Ag/sup 0/, and H/sup 0/ in glassy matrices was given in terms of the fluctuating EPR parameters. The spectra of these centers were reproduced on the assumption of a single fluctuating parameter (hyperfine coupling constant a). The close correlation was pointed out between the s character of the magnetic electron and the magnitude of the fluctuation of a. 19 references, 4 figures, 7 tables.