  The deuteron charge - exchange reaction pD->n(pp) for the low values of
momentum transfer and small excitation energies of final pp - pair is
considered in the framework of Bethe - Salpeter approach. The method of
calculation of the observables is developed for the case, when the pp - pair is
in $^1S_0$ - state. The methodical numerical calculations of the differetial
cross sections and tensor analysing powers are presented. The reaction under
consideration is predicted to be a solid base for construction of the deuteron
tensor polarimeter at high energies, and also to obtain some additional
information about elementary nucleon - nucleon charge - exchange amplitude.
