The passage of a spin-1/2 neutral particle through a region of uniform magnetic field and the corresponding precession mechanism is analyzed from the viewpoint of scattering theory, with particular consideration of the role of the field boundaries.

Martin, Ph. A. & Sassoli de Bianchi, M. (1994). Spin precession revisited. Found. Phys. 24, pp. 1371-1378 (1994). Doi: 10.1007/BF02283038.