T-1-RHO IN QUADRUPOLE-PERTURBED NMR

Spin-lattice relaxation time in the rotating frame, T-1 rho, is calcul ated in quadrupole-perturbed NMR in the weak collision limit. It is as sumed that the RF magnetic field excites only a single transition in t he quadrupole-perturbed NMR spectrum. The results of the calculation s how that T-1 rho, associated with the central (1/2<-->-1/2) transition in quadrupole-perturbed NMR of half-integer spin nuclei does not refl ect the low-frequency fluctuations of the electric field-gradient tens er. On the other hand, the low-frequency fluctuations of the electric held-gradient tenser give the largest contribution to T-1 rho when mea sured on the outer[+/-I<-->+/-(I-1)] satellite transitions. (C) 1995 A cademic Press, Inc.