Phenomena of spin rotation and oscillation of particles (atoms, molecules) containing in a trap blowing on by wind of high energy particles in storage ring - new method of measuring of spin-dependent part of zero-angle coherent scattering amplitude

摘要

New experiment arrangement to study spin rotation and oscillation ofparticles of gas target through which beam of high energy particles passes isdiscussed. Such experiment arrangement make it realizable for storage ring andallows to study zero-angle scattering amplitude at highest possible energies.Life-time of particle beam in storage ring can reach several hours and evendays. Life-time of particle in gas target (gas trap) is long too. Particlescirculate in storage ring with frequency $\nu$ of several MHz that yields tothe $\nu$-fold increase of density of high energy particles beam blowing gastrap in comparison with single passing case. Finally, this causes perfectly acceptable angle of spin rotation of particlescontaining in gas cell. Relation between index of refraction and effectivepotential energy of a particle in a medium is discussed. Phenomenon of spinrotation of a particle captured to a trap under the action of a beam ofpolarized particles is considered. Expressions for effective potential energyand angle of spin rotation are derived for particles in a trap. Rrotation andoscillation of deuteron spin is studied. Estimations for angle of rotation showthat the effect can be experimentally observed.