SPIN-FLUCTUATION SPECTRUM, PHASE RELAXATION, AND NMR OF BETA-ACTIVE LI-8 NUCLEI IN LIF CRYSTALS - FROM THE METHOD OF MEMORY FUNCTIONS TO CUMULANT EXPANSIONS

Authors
BULGAKOV MI GULKO AD DZHEPAROV FS STEPANOV SV TROSTIN SS
Citation
Mi. Bulgakov et al., SPIN-FLUCTUATION SPECTRUM, PHASE RELAXATION, AND NMR OF BETA-ACTIVE LI-8 NUCLEI IN LIF CRYSTALS - FROM THE METHOD OF MEMORY FUNCTIONS TO CUMULANT EXPANSIONS, JETP letters, 58(8), 1993, pp. 592-597
Citations number
18
Categorie Soggetti
Physics
Journal title
JETP letters → ACNP
ISSN journal
00213640
Volume
58
Issue
8
Year of publication
1993
Pages
592 - 597
Database
ISI
SICI code
0021-3640(1993)58:8<592:SSPRAN>2.0.ZU;2-W
Abstract
The magnetic-resonance shape function g(omega) of impurity beta-active Li-8 nuclei has been measured in LiF by beta-NMR spectroscopy. The ex ternal magnetic field was oriented along the [001], [011], and [111] a xes of the single crystals in different measurements. The function g(o mega) varies over nearly five orders of magnitude. The hypothesis of n ormal fluctuations of the local magnetic field at impurity nuclei, com bined with the general principles of the theory of irreversible proces ses, leads to a quite general and elementary description of the phase relaxation of these nuclei. This description is convenient for interpr eting experiments.