Polarimeters for medium-energy neutrons

Polarimeters for medium-energy neutrons are described which are based on the fact that scattering of polarized neutrons from unpolarized hydrogen nuclei exhibits a left-right (or an up-down) asymmetry. Configurations are described for neutron polarimeters that use the analyzing power of neutron-prot...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 1989-02, Vol.36 (1), p.231-240
Main Authors: Madey, R., Baldwing, A.R., Pella, P.J., Schambach, J., Sellers, R.M.
Format: Article
Language:English
Subjects:
Energy measurement
Hydrogen
Magnetic materials
Neutrons
Physics
Polarization
Power measurement
Scattering
Spectroscopy
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Summary:Polarimeters for medium-energy neutrons are described which are based on the fact that scattering of polarized neutrons from unpolarized hydrogen nuclei exhibits a left-right (or an up-down) asymmetry. Configurations are described for neutron polarimeters that use the analyzing power of neutron-proton scattering from the hydrogen in an organic scintillator material. The scattering angle theta an the azimuthal (out-of-plane) angle phi for the neutron-proton scattering event are determined from the position of the interaction in each of the two detectors involved in a given event. Consideration is given to V-configuration polarimeters, and axial-configuration polarimeter for use with a solid-angle-limiting aperture of a neutron spin-rotation magnet between the target and the polarimeter, and polarimeters configured with parallel planes of scintillator material.< >
ISSN:0018-9499
1558-1578
DOI:10.1109/23.34441