Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 597-600 |
| Seitenumfang | 4 |
| Fachzeitschrift | Hyperfine Interactions |
| Jahrgang | 16 |
| Ausgabenummer | 1-4 |
| Publikationsstatus | Veröffentlicht - Dez. 1983 |
| Extern publiziert | Ja |
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 ⊥-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.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Atom- und Molekularphysik sowie Optik
- Physik und Astronomie (insg.)
- Kern- und Hochenergiephysik
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Chemie (insg.)
- Physikalische und Theoretische Chemie
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in: Hyperfine Interactions, Jahrgang 16, Nr. 1-4, 12.1983, S. 597-600.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Low-temperature spin-lattice relaxation of8Li in the glass Li2O·2SiO2
AU - Heitjans, P.
AU - Bader, B.
AU - Stöckmann, H. J.
AU - Dörr, K.
AU - Kiese, G.
AU - Ackermann, H.
AU - Freiländer, P.
AU - Müller-Warmuth, W.
AU - Meise-Gresch, K.
PY - 1983/12
Y1 - 1983/12
N2 - 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 ⊥-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.
AB - 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 ⊥-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.
UR - http://www.scopus.com/inward/record.url?scp=34250144248&partnerID=8YFLogxK
U2 - 10.1007/BF02147324
DO - 10.1007/BF02147324
M3 - Article
AN - SCOPUS:34250144248
VL - 16
SP - 597
EP - 600
JO - Hyperfine Interactions
JF - Hyperfine Interactions
SN - 0304-3834
IS - 1-4
ER -