The neutron diffraction double-null isotopic substitution technique

Abstract
The first use of the neutron diffraction double-null isotopic substitution technique is reported to study melt-spun amorphous Dy7Ni3. The appropriate scattering equations are discussed, and measured diffraction patterns presented to illustrate that the technique is indeed a practical experimental method. The ability to set the neutron scattering length of either or both of the constituent elements to zero allows a range of elegant neutron diffraction and inelastic scattering experiments to be performed.