On spin-spin reservoir relaxation in NQR

Abstract

An attempt is made to discuss in a preliminary manner the question of the possible influence of absence of the inner equilibrium in the quadrupole spin system on the nuclear quadrupole spin-lattice relaxation. A general approach is proposed and special situations considered: small percentage of the quadrupole nuclei on the one hand and the paramagnetic impurity relaxation mechanism on the other. In the case of spin 5 2 and zero asymmetry parameter the spin-lattice relaxation time of the “quadrupole spin-spin reservoir” is calculated and compared with the “usual” quadrupole spin-lattice relaxation time.