Nuclear magnetic relaxation by quadrupole interactions in non-spherical molecules

The nuclear magnetic relaxation times associated with quadrupole interactions are investigated by an analytical method for molecules that may be linear or symmetric rotators, or may be totally asymmetric. The molecules are subject to random thermal couples, and it is supposed that the consequent rotational motion is Brownian. The results are in agreement with those obtained otherwise by Hubbard for the special case of spherical molecules.