Neutron Larmor diffraction with double and single precession arm
A.A. van Well (TU Delft - RID/Algemeen/Bedrijfsondersteuning, TU Delft - RST/Neutron and Positron Methods in Materials)
Theo Rekveldt (TU Delft - RST/Neutron and Positron Methods in Materials)
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Abstract
A review is given of double and single arm Larmor diffraction. With the former a lattice-spacing resolution down to 10-6 can be obtained. The latter is a good high-resolution alternative if the sample or sample environment disturbs the magnetic field, e.g. ferromagnetic samples or applied magnetic fields. By choosing the tilt angle of the precession fields the optimum resolution can be set at a scattering angle at choice. The resolution for both single-crystal and polycrystalline samples is discussed in depth and is compared with conventional neutron-diffraction techniques.