Abstract
The experimental and theoretical NQR multiple-pulse spin locking study of cross-relaxation process in solids containing nuclei of two different sorts I > 1/2 and S = 1/2 coupled by the dipole-dipole interactions and influenced by an external magnetic field. Two coupled equations for the inverse spin temperatures of the both spin systems describing the mutual spin lattice relaxation and the cross-relaxation were obtained using the method of the nonequilibrium state operator. It is shown that the relaxation process is realized with non-exponential time dependence describing by a sum of two exponents. The cross relaxation time is calculated as a function of the multiple-pulse field parameters which agree with the experimental data. The calculated magnetization cross relaxation time vs the strength of the applied magnetic field agrees well with the obtained experimental data.
| Original language | English |
|---|---|
| Pages (from-to) | 115-125 |
| Number of pages | 11 |
| Journal | Hyperfine Interactions |
| Volume | 181 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - 1 Jan 2008 |
Keywords
- Cross relaxation
- Multiple-pulse spin locking
- Nuclear quadrupole resonance
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics
- Condensed Matter Physics
- Physical and Theoretical Chemistry