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Pushing the limits of neutron backscattering spectroscopy: A tenfold enhanced energy resolution using GaAs 200

A prototype neutron backscattering spectrometer using the GaAs 200 Bragg reflection has been developed to bring about a significant increase in energy resolution. The gain in resolution is offered by the narrow intrinsic line width of GaAs 200, an order of magnitude smaller than the line width of the currently used Si 111. Test measurements of the prototype on the backscattering spectrometer IN16B at the ILL have yielded an unprecedented energy resolution of δE = (76.5 ± 3.3) neV FWHM, a factor of 10 smaller than the current standard as well as a factor of 4 smaller than the highest currently available resolution in neutron backscattering. Further, the measurements have provided proof of concept for the construction of a full-scale user instrument.

Seminar: Neutronen in Forschung und Industrie

Datum29.01.2018
Uhrzeit14:30 - 15:30 Uhr
OrtGarching
RaumHS 3, Physik-Department der TUM
SprecherDr. Kristijan Kuhlmann, Friedrich-Alexander Universität Erlangen-Nürnberg / Institut Laue-Langevin
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MLZ, TUM

MLZ is a cooperation between:

Technische Universität München> Technische Universität MünchenHelmholtz-Zentrum Geesthacht> Helmholtz-Zentrum GeesthachtForschungszentrum Jülich> Forschungszentrum Jülich