Polarization observables of the $\vec{d} \vec{p} \rightarrow \vec{p}d$   reaction and one-neutron-exchange approximation
  The polarization observables in the elastic scattering of polarized deuterons on a polarized hydrogen target, with measurement of the recoil proton polarization, are considered. The observables are calculated in the one-neutron exchange approximation, for the special case of backward scattering ($\theta_{c.m.} = 180^{\circ}$). Several new relations between polarization observables of the reaction are derived within the framework of this approximation. 
A. P. Kobushkin, A. I. Syamtomov, C. F. Perdrisat, V. Punjabi