ANALYZING POWER OF THE REACTIONS D-UP-ARROW-]P+X AND D-UP-ARROW+C-]P+P(D)+X AT ENERGIES 0.6-2.1 GEV(C)NUCLEON/

The analyzing power of the reaction d up + C --> p + X has been measur ed in a deuteron beam at deuteron energies 0.6, 0.8, 1.0, and 2.1 GeV/ nucleon. The analyzing power behaves in the same way as in a beam of p olarized protons. At angles above 90-degrees, the analyzing power is s mall. In the interval 70-degrees-90-degrees, it is positive. It increa ses with increasing energy of the detected protons, reaching a maximum of approximately 30%. A correlation experiment carried out at 0.8 GeV /nucleon revealed coincidences between fast protons emitted at angles 75-degrees and 90-degrees, on the one hand, and particles in the forwa rd hemisphere, on the other. Two distinct mechanisms are identified. T hey differ in the sign of the analyzing power. They make comparable co ntributions to the emission of fast protons at angles near 90-degrees.