 Other neutron scattering techniques measure the dynamic structure factor S(Q,ω), which can be converted to F(Q,t) by a Fourier transform, which may be difficult in practice.For weak inelastic features S(Q,ω) is better suited, however, for (slow) relaxations the natural representation
is given by F(Q,t).Because of its extraordinary high effective energy resolution compared to other neutron scattering techniques, NSE is an ideal method to observe 
overdamped internal dynamic modes (relaxations) and other diffusive processes in materials such as a polymer blends, alkane chains, or microemulsions.