Non-reciprocity in elastic unpolarized neutron scattering by systems with non-coplanar magnetic structure

The paper provides a theoretical analysis for elastic unpolarized neutron scattering by systems having a non-coplanar magnetic induction spatial distribution. It is shown that reciprocity does not hold for neutron scattered by these systems. The scattering of unpolarized neutrons by a system of three magnetic mirrors and by a ferromagnetic particle in a "vortex" state is also explored.