TUNNELING-FRUSTRATED TOTAL-REFLECTION OF POLARIZED NEUTRON WAVES AND NEW-GENERATION OF NEUTRON INTERFEROMETER

The purpose of the work reported here is to present a new generation o f neutron interferometer using a new splitting mode. This method is ba sed on the tunneling-frustrated total reflection of neutron waves. The splitting of an incident neutron beam into two coherent partial beams is achieved by using magnetized Fabry-Perot resonators. These resonat ors, which work in total reflection condition, are constituted by stac ks of Ni-58/ Co/ Ni-58/ bulk Co. When the resonance condition of the F abry-Perot is fulfilled, resonant spin-down waves are totally tunneled while the corresponding spin-up waves are totally reflected. The numb er of these tunneling resonances changes mainly with the thickness of the spacer layer of Co while their bandpass is linked to the thickness of the reflecting Ni-58 layers.