Spin rotation and oscillations for high energy particles in a crystal   and possibility to measure the quadrupole moments and tensor polarizabilities   of elementary particles and nuclei
  It is shown that particle motion in a bent (straight) crystal is accompanied by particle spin rotation and oscillations that allows to measure the tensor electric and magnetic polarizabilities of nuclei and elementary particles. It is shown that channelling of particles in either straight or bent crystal with the polarized nuclei could be used both to analyze polarization of high energy particles and polarize them. 
V.G. Baryshevsky, A.A. Gurinovich