NMR relaxometry: Spin lattice relaxation times in the laboratory frame versus spin lattice relaxation times in the rotating frame

作者：Steiner Emilie; Yemloul Mehdi; Guendouz Laoues; Leclerc Sebastien; Robert Anthony; Canet Daniel^*

来源：Chemical Physics Letters, 2010, 495(4-6): 287-291.

DOI：10.1016/j.cplett.2010.06.064

Relaxometry dispersion curves display the spin lattice relaxation rate as a function of the measurement frequency. However, as far as proton NMR is considered, dispersion curves usually start around 5 kHz and thus miss the very low frequency region. This gap can be filled by the measurement of the spin-lattice relaxation rate in the rotating frame. The issue of connecting both relaxation rates is considered for two relaxation mechanisms: (i) randomly varying magnetic fields, (ii) dipolar interaction within a system of two equivalent spins. Appropriate data processing is presented and the random field mechanism turns out to be adequate.

• 出版日期2010-8-10