On depolarization of ultracold neutrons in traps
Yu. N. Pokotilovski
Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
PACS: 14.20.Dh, 25.40.Dn, 61.12.Ha
Abstract
Mechanisms of depolarization of ultracold neutrons in traps are
considered when they reflect from the trap's wall. One is due to neutron
spin-flip elastic or quasielastic incoherent scattering on protons of surface
hydrogen contaminations. According to the second one significant
depolarization may take place because of sudden change of neutron trajectory
at reflection from the wall when neutron move even at large adiabaticity
parameters in nonuniform magnetic field.