POLARIZATION TRANSFER IN ((P)OVER-RIGHT-ARROW, (N)OVER-RIGHT-ARROW) REACTIONS AT 318-MEV AND 494-MEV AND THE EFFECTIVE INTERACTION

The polarization transfer observable D(LL)(0-degrees) has been measure d for H-2(p over arrow pointing right, n over arrow pointing right)2p, C-12(p over arrow pointing right, n over arrow pointing right)N-12, a nd C-14(p over arrow pointing right, n over arrow pointing right)N-14 reactions with beam energies of 318 and 494 MeV. The deuterium results are in close agreement with free NN scattering constrained to the DEL TAJ(pi) = 1+ channel. The results for the carbon targets, however, are systematically more negative than those for deuterium, which suggests a difference between the free and effective nucleon-nucleon interacti ons. Such a medium modification of the spin-dependent interaction may have important implications for interpretation of other intermediate-e nergy scattering experiments.