Neutron Spin Echo

Neutron spin echo spectroscopy is an inelastic neutron scattering technique invented by Ferenc Mezei in the 1970s, and developed in collaboration with John Hayter. In recognition of his work and in other areas, Mezei was awarded the first Walter Haelg Prize in 1999.

The spin echo spectrometer possesses an extremely high energy resolution (roughly one part in 100,000). Additionally, it measures the density-density correlation (or intermediate scattering function) F(Q,t) as a function of momentum transfer Q and time. Other neutron scattering techniques measure the dynamic structure factor S(Q,ω), which can be converted to F(Q,t) by a Fourier transform, which may be difficult in practice. For weak inelastic features S(Q,ω) is better suited, however, for (slow) relaxations the natural representation is given by F(Q,t). Because of its extraordinary high effective energy resolution compared to other neutron scattering techniques, NSE is an ideal method to observe overdamped internal dynamic modes (relaxations) and other diffusive processes in materials such as a polymer blends, alkane chains, or microemulsions. The extraordinary power of NSE spectrometry was further demonstrated recently by the direct observation of coupled internal protein dynamics in the proteins NHERF1 and Taq polymerase, allowing the direct visualization of protein nanomachinery in motion.

Read more about Neutron Spin EchoHow It Works, What It Can Measure, NSE and Spin-incoherent Scattering (from Protons), Existing Spectrometers, See Also

Other articles related to "spin, neutron, neutron spin echo, spin echo":

Timeline Of Atomic And Subatomic Physics - The Age of Quantum Mechanics
1922 Otto Stern and Walther Gerlach show "spin quantization" 1923 Lise Meitner discovers the Auger process 1924 Louis de Broglie suggests that electrons may have wavelike properties in addition to their 'particle ... exclusion principle for fermions 1925 George Uhlenbeck and Samuel Goudsmit postulate electron spin 1925 Pierre Auger discovers the Auger process (2 years after Lise Meitner) 1925 Werner ... interatomic potential 1931 Irène Joliot-Curie and Frédéric Joliot observe but misinterpret neutron scattering in paraffin 1931 Wolfgang Pauli puts forth the ...
Neutron Spin Echo - See Also
... Biological small-angle scattering Larmor precession Neutron resonance spin echo NMR Protein domain Soft matter Spin echo ...

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