spin-echo neutron scattering spin-echo small angle neutron scattering A method for determining structure by measuring the velocity of neutrons in known magnetic fields before and after scattering at small angles by the sample. The neutrons are scattered by the interaction of neutron spin with spins in the sample ('spin echo'). spin-echo small angle neutron scattering non-magnetic spin-echo small angle neutron scattering SEANS CHMO:0000197 spin-echo SANS non-magnetic SEANS non-magnetic spin-echo SANS