  We analyze the momentum distributions of constituents in 3He, as well as the
spin-dependent observables for (3He,d), (3He,p), and (d,p) breakup reactions.
Special attention is paid to the region of small relative momenta of the
helium-3 and the deuteron constituents, where a single parameter, D_2, has
determining role for the spin-dependent observables. We extract also this
parameter for the deuteron, basing on existing data for the tensor analyzing
power of this reaction.
