NIST scientists and international collaborators have developed a new method to manipulate neutron beams using two quantum properties – orbital angular momentum (OAM) and spin. By correlating these properties, the team created a patterned neutron beam that can more precisely examine materials with complex magnetic structures, such as helical molecules and topological materials. The achievement could expand the use of neutron beams in studying materials science, chemistry, and biology.
The process involved polarizing the neutron beam by passing it through helium-3 gas chambers, then shaping it into a helical wave using magnetic coils. This created a beam with a specific OAM value and spin pattern, allowing researchers to examine materials at the molecular and atomic level with greater precision. The technique could have applications in studying DNA, chiral molecules, and other complex materials.
Keywords: Neutron, Magnetic, Angular momentum, Spin, Helix
