The uv absorption spectra caused by Pb in bulk silicate glasses and in a film sputtered from 1.08 PbO·SiO 2 glass are measured. Lead causes a strong absorption band between 5 and 6 eV. Vacuum uv measurements on the sputtered film reveal a second, much larger, absorption band that has a maximum near 7.6 eV and that is tentatively attributed to excitation of an O ion bonded to a Pb 2+ ion.
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Stroud et al. (1971) studied this question.
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