Broadband Neutron Interferometer
  We demonstrate a two phase-grating, multi-beam neutron interferometer by using a modified Ronchi setup in a far-field regime. The functionality of the interferometer is based on the universal \moire effect that was recently implemented for X-ray phase-contrast imaging in the far-field regime. Interference fringes were achieved with monochromatic, bichromatic, and polychromatic neutron beams; for both continuous and pulsed beams. This far-field neutron interferometry allows for the utilization of the full neutron flux for precise measurements of potential gradients, and expands neutron phase-contrast imaging techniques to more intense polycromatic neutron beams. 
Dmitry A. Pushin, Dusan Sarenac, Dan Hussey, Houxun Miao, Muhammad   Arif, David G. Cory, Michael G. Huber, David Jacobson, ...
physics.ins-det nucl-ex physics.optics quant-ph