Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Far-field interference of a neutron white beam and the applications to noninvasive phase-contrast imaging



Michael G. Huber, Daniel S. Hussey, Muhammad D. Arif, David L. Jacobson, Jacob LaManna, Wakana Ueno, Han Wen, Dmitry Pushin, Dusan Sarenac, David Cory, Houxun Miao, Takenao Shinohara, Joseph Parker


The phenomenon of interference plays a crucial role in the field of precision measurement science. Waveparticle duality has expanded the well-known interference effects of electromagnetic waves to massive particles. The majority of the wave-particle interference experiments require a near monochromatic beam which limits its applications due to the resulting low intensity. Here we demonstrate white beam interference in the far-field regime using a two-phase-grating neutron interferometer and its application to phase-contrast imaging. The functionality of this interferometer is based on the universal moiré effect that allows us to improve upon the standard Lau setup. Interference fringes were observed with monochromatic and polychromatic neutron beams for both continuous and pulsed beams. Far-field neutron interferometry allows for the full utilization of intense neutron sources for precision measurements of gradient fields. It also overcomes the alignment, stability, and fabrication challenges associated with the more familiar perfect-crystal neutron interferometer, as well as avoids the loss of intensity due to the absorption analyzer grating requirement in Talbot-Lau interferometer.
Physical Review A (Atomic, Molecular and Optical Physics)


Neutron Interferometry, Neutron Imaging, Far-Field Interferometry


Huber, M. , Hussey, D. , Arif, M. , Jacobson, D. , LaManna, J. , Ueno, W. , Wen, H. , Pushin, D. , Sarenac, D. , Cory, D. , Miao, H. , Shinohara, T. and Parker, J. (2021), Far-field interference of a neutron white beam and the applications to noninvasive phase-contrast imaging, Physical Review A (Atomic, Molecular and Optical Physics), [online], (Accessed July 7, 2022)
Created April 21, 2021, Updated April 27, 2022