  The exclusive charge exchange reaction pD->n(pp) at intermediate and high
energies is studied within the Bethe-Salpeter formalism. The final state
interaction in the detected pp pair at nearly zero excitation energy is
described by the 1S0 component of the Bethe-Salpeter amplitude. Results of
numerical calculations of polarization observables and differential
cross-section persuade that, as in the non-relativistic case, this reaction (i)
can be utilized as a ``relativistic deuteron polarimeter'' and (ii) delivers
further information about the elementary nucleon-nucleon charge-exchange
amplitude.
