Optical model and folding model potentials for elastic scattering of 56 MeV polarized deuterons

Abstract

Differential cross sections σ and all four analyzing powers A y , A xx , A yy and A xz have been measured for deuteron elastic scattering from 12C, 16O, 40Ca, 58Ni, 90Zr, 118Sn, 144Sm and 208Pb at 56 MeV. The tensor analyzing power A xz was measured using horizontally polarized deuterons. These data were analyzed in terms of an optical potential containing central, spin-orbit and T R type tensor terms. A complex T R tensor potential was necessary to explain A xz and the quantity X 2 = (2A xx + A yy) √3 . The optical potentials obtained were compared with exact folding model calculations. The real part of the T R tensor potential is generally smaller than the folding model potential, especially for heavier nuclei. The imaginary T R potential is comparable with the folding model for lighter nuclei and is smaller than the folding model for heavier nuclei. The folding model T R potential overestimates the amplitudes of the A xz and X 2 data. Features of the σ, A y and A yy data at large angles are discussed in connection with nuclear rainbow scattering.