Multiple quantum NMR transitions of⁸Li (T_1/2=0.84 s) in single crystals and powders of LiTaO₃, and the quadrupole moment of⁸Li

authored by

D. Dubbers, K. Dörr, H. Ackermann, F. Fujara, H. Grupp, M. Grupp, P. Heitjans, A. Körblein, H. J. Stöckmann

Abstract

Multiple quantum nuclear magnetic resonance (NMR) transitions were observed on polarized⁸Li nuclei, which were produced by capture of polarized neutrons in a single crystal of LiTaO₃. The asymmetric⁸Li β-radiation distribution was used for the detection of NMR. A quadrupole moment ratio |Q(⁸Li)/Q(⁷Li)|=0.78(1) was determined. Saturation of multiple quantum transitions in nuclear radiation detected NMR may lead to a reduction in measuring time of up to two orders of magnitude, as compared to single quantum detection methods. The measured spectra agree well with an exact lineshape calculation. The same measurements were also performed on a LiTaO₃ powder sample. This was done to test a method to obtain quadrupole coupling constants from high field NMR multiple quantum powder patterns, which are easily detectable, also for higher nuclear spins. This latter method may be applicable also to conventional NMR detection techniques.

External Organisation(s)

Heidelberg University
Institut Laue-Langevin

Type

Article

Journal

Zeitschrift für Physik A Atoms and Nuclei

Volume

282

Pages

243-248

No. of pages

6

ISSN

0340-2193

Publication date

09.1977

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

Electronic version(s)

https://doi.org/10.1007/BF01414890 (Access: Unknown)