Spin diffusion and nuclear spin-lattice relaxation in irradiated solids: A multiple-pulse NQR study

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5 Scopus citations

Abstract

We present a detailed theoretical and experimental NQR multiple-pulse spin-locking study of spin-lattice relaxation and spin diffusion processes in the presence of paramagnetic impurities in solids. The relaxation function of the nuclear spin system at the beginning of the relaxation process is given by exp ( - t/T)α, where T is spin-lattice relaxation time in rotating frame and α = d/6, d is the sample dimensionality. Then the relaxation proceeds asymptotically to an exponential function of time, which was attributed to the spin-diffusion regime. Using the experimental data obtained from the analysis of those two relaxation regimes in γ-irradiated powdered NaClO3, spin diffusion coefficient has been determined and the radius of the diffusion barrier has been estimated.

Original languageEnglish
Pages (from-to)145-155
Number of pages11
JournalSolid State Nuclear Magnetic Resonance
Volume14
Issue number3-4
DOIs
StatePublished - 1 Sep 1999

Keywords

  • NQR
  • Paramagnetic impurities
  • Relaxation
  • Spin diffusion

ASJC Scopus subject areas

  • Radiation
  • General Chemistry
  • Nuclear and High Energy Physics
  • Instrumentation

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