Low Dimensional Lattice Diffusion in Solids Investigated by Nuclear Spin   Echo Measurements
  Lattice diffusion and internal local magnetic field gradients in solids are investigated by numerical simulation of nuclear mangetic resonance(NMR) spin echo experiments. The Fourier-spectrum method is employed in order to solve the Bloch-Torrey equation with arbitrary magnetic field gradients in one- and two-dimensional lattice restrictions. 
Naoki Asakawa, Kiyohiko Matsubara, Yoshio Inoue