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Low-temperature spin-lattice relaxation of8Li in the glass Li2O·2SiO2

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Abstract

Nuclear spin-lattice relaxation in Li20·2Si02 glass below 200 K has been studied using the asymmetric Β-decay radiation of polarized8Li (T1/2=0.Bs) nuclei produced by capture of polarized neutrons. Transients of the8Li polarization follow an exp(−√E/T1) law. The dependence of the spin-lattice relaxation rate ⊥¯1 1 on temperature T and magnetic field B can roughly be described by T¯1 1∼T/B. The interpretation is based on the assumption that for8Li, contrary to7Li in the same glass, spin-diffusion is absent and that each probe nucleus is coupled by quadrupolar interaction to an individual distribution of nearby centres typical of glasses. The fluctuation of these centres causing relaxation may be induced by either a multi-phonon or a thermally activated motional process.

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Authors and Affiliations

  1. Fachbereich Physik, Universität Marburg, W.-Germany

    P. Heitjans, B. Bader, H. -J. Stöckmann, K. Dörr, G. Kiese, H. Ackermann & P. Freiländer

  2. Institut Laue-Langevin, Grenoble, France

    P. Heitjans, B. Bader, H. -J. Stöckmann, K. Dörr, G. Kiese, H. Ackermann & P. Freiländer

  3. Institut für Physikalische Chemie, Univ. Münster, W.-Germany

    W. Müller-Warmuth & K. Meise-Gresch

Authors
  1. P. Heitjans
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  2. B. Bader
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  3. H. -J. Stöckmann
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  4. K. Dörr
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  5. G. Kiese
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  6. H. Ackermann
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  7. P. Freiländer
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  8. W. Müller-Warmuth
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  9. K. Meise-Gresch
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This work is sponsored by the Bundesministerium für Forschung und Technologie.

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Heitjans, P., Bader, B., Stöckmann, H.J. et al. Low-temperature spin-lattice relaxation of8Li in the glass Li2O·2SiO2 . Hyperfine Interact 16, 597–600 (1983). https://doi.org/10.1007/BF02147324

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  • DOI: https://doi.org/10.1007/BF02147324

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