Cross-relaxation processes of polarized β-active nuclei in various crystalline solids

authored by

F. Fujara, H. J. Stöckmann, H. Ackermann, W. Buttler, K. Dörr, H. Grupp, P. Heitjans, G. Kiese, A. Körblein

Abstract

Cross-processes of neutron activated, polarized nuclei I with surrounding stable host nuclei S are observed in diverse solids, using an in-beam NMR technique where the polarized I nuclei are produced by capture of polarized thermal neutrons. The polarization is determined by measuring the 0°-180° asymmetry of the β-decay radiation of these nuclei. The following cross-processes are studied:⁸Li-⁶Li in^natLi metal;⁸Li-⁷Li in⁷Li metal;⁸Li-⁶Li in^natLiF (single crystal);⁸Li-⁹³Nb in⁷LiNbO₃ (single crystal);²⁰F-¹⁹F in MgF₂ (single crystal). Two applications are presented: a) Determination of the temperature dependence of the electrical quadrupole coupling constant of⁹³Nb in LiNbO₃; b) Observation of radiation induced point defects in MgF₂ and their thermal annealing. All measurements are performed without any radiofrequency irradiation.

External Organisation(s)

Heidelberg University
Philipps-Universität Marburg
Institut Laue-Langevin

Type

Article

Journal

Zeitschrift für Physik B Condensed Matter and Quanta

Volume

37

Pages

151-161

No. of pages

11

ISSN

0340-224X

Publication date

06.1980

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Electronic version(s)

https://doi.org/10.1007/BF01365371 (Access: Unknown)