Change in Neutron Polarization Induced by a Superconductor Rotated in a Magnetic Field

V. Zhuchenko

Neutron depolarization (i.e. the change in the polarization vector projection onto the applied magnetic field) depends on neutron Larmor frequency ωL in the superconductor and on a frequency ω, ω being related to the directional variation of the magnetic induction inside the superconductor. Depolarization is small if η= ωL/ω≫1. In the opposite limite η≪1, the depolarization is due to neutron spin rotation about the magnetic flux, which, in turn, rigidly rotates with a superconductor. a total spin reversal is possible at η= 1. Depolarization at a stationary rotation angle in a superconducting plate carrying a transport critical current in a magnetic field is considered as well. Depolarisation is determined by either longitudinal or transversal critical currents depending on the angle between the applied field and the critical current direction.

Domaines: Articles anciens

V. Zhuchenko. Change in Neutron Polarization Induced by a Superconductor Rotated in a Magnetic Field. Journal de Physique I, 1997, 7 (1), pp.177-185. ⟨10.1051/jp1:1997132⟩. ⟨jpa-00247324⟩