The neutron spin phase imaging technique applied to dia- and paramagnetic samples

We report on a novel application of the Neutron Spin Phase Imaging technique, by performing polarised neutron radiography on dia- and paramagnetic samples. In order to achieve the necessary sensitivity we employed a 2.5 T Ramsey apparatus which was used in a previous experiment to measure the spin-dependent neutron scattering length of the deuteron. First successful results on aluminium, lead, titanium and heavy water (D₂O) samples are presented. They are in good quantitative agreement with expected values deduced from susceptibility measurements.