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Triple-axis spectrometry (TAS, T also resolved as "three", S also resolved as "spectroscopy") is a technique used in inelastic neutron scattering. The instrument is referred to as triple-axis spectrometer (also called TAS). It allows measurement of the scattering function at any point in energy and momentum space physically accessible by the spectrometer.
Contents
- History
- FRM II Forschungsneutronenquelle Heinz Maier Leibnitz
- Helmholtz Zentrum Berlin fr Materialien und Energie
- Paul Scherrer Institut
- Institut Laue Langevin
- CEASaclay Laboratoire Lon Brillouin
- NIST Center for Neutron Research
- ANSTO Bragg Institute
- MURR University of Missouri Research Reactor
- References
History
The triple-axis spectrometry method was first developed by Bertram Brockhouse at the National Research Experimental NRX reactor at the Chalk River Laboratories in Canada. The first results from the prototype triple-axis spectrometer were published in January 1955 and the first true triple-axis spectrometer was built in 1956. Bertram Brockhouse shared the 1994 Nobel prize for Physics for this development, which allowed elementary excitations, such as phonons and magnons, to be observed directly. The Nobel citation was "for pioneering contributions to the development of neutron scattering techniques for studies of condensed matter" and "for the development of neutron spectroscopy".
FRM-II Forschungsneutronenquelle Heinz Maier-Leibnitz
Helmholtz-Zentrum Berlin für Materialien und Energie
Paul Scherrer Institut
Institut Laue-Langevin
CEA/Saclay Laboratoire Léon Brillouin
