RADIATION DAMPING IN HIGH-RESOLUTION LIQUID NMR - A SIMULATION STUDY

Radiation damping generates surprising new features in two-dimensional and spin-echo experiments. The theoretical interpretation of the unex pected results has led to some controversy. The purpose of the present paper is to show, by computer simulations, that the experimental resu lts can be completely understood by describing radiation damping throu gh a classical magnetic held caused by the current induced in the samp le coil (resonantly enhanced by the high quality factor of the tuned c ircuit), and acting back on the spins. We examine a variety of two-dim ensional and ''multiple quantum'' experiments in homogeneous fields, a nd spin-echo experiments in a fixed field gradient (with and without m olecular diffusion). (C) 1995 American Institute of Physics.