Neutron supermirror

For optical mirrors, see Perfect mirror.

Science with Neutrons

Foundations
Neutron temperature Flux · Radiation · Transport Cross section · Absorption · Activation
Neutron scattering
Neutron diffraction Small-angle neutron scattering GISANS Reflectometry Inelastic neutron scattering Triple-axis spectrometer Time-of-flight spectrometer Backscattering spectrometer Spin-echo spectrometer
Other applications
Neutron tomography Activation analysis · Prompt gamma activation analysis Fundamental research with neutrons: Ultracold neutrons · Interferometry Fast neutron therapy Neutron capture therapy
Infrastructure
Neutron sources: Research reactor · Spallation · Neutron moderator Neutron optics: Guide · Supermirror · Polarizer Detection
Neutron facilities
America: HFIR · LANSCE · NIST CNR -SNS Australia: OPAL Asia: J-PARC · HANARO Europe: BER II · FRM II · ILL · ISIS · JINR · LLB · PINS · SINQ Historic: IPNS · HFBR Planned: ESS User Affiliations: ENSA

A neutron supermirror is a highly polished surface used in connection with neutron beams.

Supermirrors are produced by depositing and polishing large numbers of layers of a reflecting substance, such as silicon, nickel, titanium or nickel/titanium composite, on a substrate. In this way, the critical angle of total reflection becomes $n\cdot\theta_c$ , where $n$ is the number of layers and $\theta_c$ the angle of total reflection for a single layer.

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