Neutron backscattering is one of several inelastic neutron scattering techniques. Backscattering from monochromator and analyzer crystals is used to achieve an energy resolution on the order of a microelectronvolt (μeV). Neutron backscattering experiments are performed to study atomic or molecular motion on a nanosecond time scale.
This section needs expansion. You can help by adding to it. (February 2019)
Neutron backscattering was proposed by Heinz Maier-Leibnitz in 1966,[1] and realized by some of his students in a test setup at the research reactor FRM IinGarching bei München, Germany.[2] Following this successful demonstration of principle, permanent spectrometers were built at Forschungszentrum Jülich and at the Institut Laue-Langevin (ILL). Later instruments brought an extension of the accessible momentum transfer range (IN13 at ILL), the introduction of focussing optics (IN16 at ILL), and a further increase of intensity by a compact design with a phase-space transform chopper (HFBS at NIST, SPHERES at FRM II, IN16B at the Institut Laue-Langevin).
Operational backscattering spectrometers at reactors include IN10, IN13, and IN16B at the Institut Laue-Langevin, the High Flux Backscattering Spectrometer (HFBS) at the NIST Center for Neutron Research,[3]
the SPHERES instrument of Forschungszentrum JülichatFRM II[4]
and EMU at ANSTO.
Historic instruments are the first backscattering spectrometer that was a temporary setup at FRM I
and the backscattering spectrometer BSS (also called PI) at the DIDO reactor of the Forschungszentrum Jülich (decommissioned).[5]
![[icon]](https://akarinohon.com/text/taketori.cgi/en.wikipedia.org/wiki/File:Wiki_letter_w_cropped.svg@.22_LR){kind=small}
