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

verfasst von

P. Heitjans, B. Bader, H. J. Stöckmann, K. Dörr, G. Kiese, H. Ackermann, P. Freiländer, W. Müller-Warmuth, K. Meise-Gresch

Abstract

Nuclear spin-lattice relaxation in Li₂0·2Si0₂ glass below 200 K has been studied using the asymmetric Β-decay radiation of polarized⁸Li (T_1/2=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 ⊥_-1¹ on temperature T and magnetic field B can roughly be described by T_-1¹∼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.

Externe Organisation(en)

Philipps-Universität Marburg
Institut Laue-Langevin
Westfälische Wilhelms-Universität Münster (WWU)

Typ

Artikel

Journal

Hyperfine Interactions

Band

16

Seiten

597-600

Anzahl der Seiten

4

ISSN

0304-3834

Publikationsdatum

12.1983

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Atom- und Molekularphysik sowie Optik, Kern- und Hochenergiephysik, Physik der kondensierten Materie, Physikalische und Theoretische Chemie

Elektronische Version(en)

https://doi.org/10.1007/BF02147324 (Zugang: Unbekannt)