| Science with Neutrons |
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| Neutron scattering |
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| Neutron facilities |
A Neutron Velocity Selector is a device that allows neutrons of defined velocity to pass while absorbing all other neutrons, used for the purpose of producing a monochromatic neutron beam.[1] It has the appearance of a many-bladed turbine. The blades are coated with a strongly neutron-absorbing material, such as Boron-10.
Neutron velocity selectors are commonly used in neutron research facility to produce a monochromatic beam of neutrons. Due to physical limitations of materials and motors, limiting the maximum speed of rotation of the blades, these devices are only useful for relatively slow neutrons.