Long-time behavior of nuclear spin decays in various lattices

The transverse NMR decays of {sup 129}Xe in polycrystalline xenon were recently shown to have a universal property: in the long-time regime these decays all converge to the same sinusoidally modulated exponential function irrespective of the initial transverse spin configuration prepared by a sequen...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2011-02, Vol.83 (6), Article 064302
Main Authors: Sorte, E. G., Fine, B. V., Saam, B.
Format: Article
Language:English
Subjects:
ADMINISTRATIVE PROCEDURES
ALKALINE EARTH METAL COMPOUNDS
ANGULAR MOMENTUM
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
DAYS LIVING RADIOISOTOPES
DECAY
ELECTROMAGNETIC RADIATION
ELEMENTS
EVEN-ODD NUCLEI
EXCEPTIONS
FLUIDS
FLUORIDES
FLUORINE 19
FLUORINE COMPOUNDS
FLUORINE ISOTOPES
GASES
HALIDES
HALOGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MONOCRYSTALS
NONMETALS
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
POLYCRYSTALS
PULSES
RADIATIONS
RADIOISOTOPES
RADIOWAVE RADIATION
RARE GASES
RESOLUTION
RESONANCE
SPIN
STABLE ISOTOPES
XENON
XENON 129
XENON ISOTOPES
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Summary:The transverse NMR decays of {sup 129}Xe in polycrystalline xenon were recently shown to have a universal property: in the long-time regime these decays all converge to the same sinusoidally modulated exponential function irrespective of the initial transverse spin configuration prepared by a sequence of one or more radio frequency pulses. The present work constitutes a more comprehensive survey of this phenomenon. It examines transverse decays for several different isotopic concentrations of {sup 129}Xe, employs additional pulse sequences, and performs similar measurements in a different material: {sup 19}F in single-crystal and polycrystalline CaF{sub 2}. With the possible exception of polycrystalline CaF{sub 2} where the observation of the long-time behavior is limited by the experimental resolution, all these systems display the long-time universal behavior characterized by particular values of the exponential decay coefficient and beat frequency that were unique for each lattice. This behavior has been theoretically predicted based on the notion of microscopic chaos.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.83.064302