Passage of polarized neutrons through magnetic media. Depolarization by magnetized inhomogeneities |
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Authors: | V I Sbitnev |
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Institution: | (1) Leningrad B.P. Konstantinov Institute of Nuclear Physics, Academy of Sciences of the USSR, 188350 Gatchina, Leningrad district, USSR |
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Abstract: | The behavior of a neutron polarization vector for neutrons passing through magnetic media characterized by a magnetic fluctuation tensor is described by Bloch-type equation. Coherent and incoherent spin flow motions on the surface of an unit three-dimension sphere are reflected by the equation. The applicability of the equation is based on two factors: (a) the SU(2) group analysis of the neutron spin behaviour in a magnetic field; and (b) consecutive averaging of spin trajectories in the SU(2) group manifold over all neutrons passing through a thin sample layer. Halpern-Holstein's and Maleyev-Ruban's depolarizations are discussed. |
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