1988 | OriginalPaper | Buchkapitel
NMR Studies of Neutron-Irradiated Crystalline and Vitreous Silica
verfasst von : S. L. Chan, L. F. Gladden, S. R. Elliott
Erschienen in: The Physics and Technology of Amorphous SiO2
Verlag: Springer US
Enthalten in: Professional Book Archive
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Some results of a 29Si NMR study of neutron-irradiated crystalline and vitreous SiO2 are reported. The spin-lattice relaxation time is found to change markedly with increasing neutron dose. Pronounced changes are also observed in the shape and position of the magic-angle spinning NMR lineshape. The shift in peak position for the metamict state is associated with a decrease in oxygen bond angle, and this is related to the densificaction of the glass observed upon neutron irradiation.