Polarization transfer in (<b>p</b>,<b>n</b>) reactions at 318 and 494 MeV and the effective interaction

D. J. Mercer; T. N. Taddeucci; L. J. Rybarcyk; X. Y. Chen; D. L. Prout; R. C. Byrd; J. B. McClelland; W. C. Sailor; S. DeLucia; B. Luther; D. G. Marchlenski; E. Sugarbaker; E. Gülmez; C. A. Whitten, Jr; C. D. Goodman; J. Rapaport

doi:10.1103/PhysRevLett.71.684

Polarization transfer in (p,n) reactions at 318 and 494 MeV and the effective interaction

D. J. Mercer, T. N. Taddeucci, L. J. Rybarcyk, X. Y. Chen, D. L. Prout, R. C. Byrd, J. B. McClelland, W. C. Sailor, S. DeLucia, B. Luther, D. G. Marchlenski, E. Sugarbaker, E. Gülmez, C. A. Whitten, Jr., C. D. Goodman, and J. Rapaport

Phys. Rev. Lett. 71, 684 – Published 2 August 1993

Abstract

The polarization transfer observable $D_{L L}$ (0°) has been measured for ${}^{2}H$ (p→,n→)2p, ${}^{12}C$ (p→,n→ $)^{12}$ N, and ${}^{14}C$ (p→,n→ $)^{14}$ N reactions with beam energies of 318 and 494 MeV. The deuterium results are in close agreement with free NN scattering constrained to the Δ $J^{π}$ = $1^{+}$ 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 interactions. Such a medium modification of the spin-dependent interaction may have important implications for intepretation of other intermediate-energy scattering experiments.