Elastic and inelastic scattering of 88 MeV 6Li ions

Abstract

The elastic scattering of 88 MeV 6Li ions has been studied for eleven targets ranging in mass from 24Mg to 208Pb. Angular distributions were measured from about 10° c.m. in steps of 0.5°, mostly out to 60 or 70° c.m. where the elastic cross sections range from 10 −3 to 10 −5 of the Rutherford values. Inelastic data for exciting the lowest 2 + states of 24,26Mg and 60Ni were also obtained. The elastic data were analyzed using the optical model, with potentials of both Woods-Saxon and double-folding forms. The analysis confirms that the potentials for 6Li obtained from the folding model with the M3Y interaction need renormalizing by about 0.6, in agreement with results obtained at other energies. The inelastic data were compared to distorted-wave calculations. Coupled-channels analyses were also made for 24, 26Mg, 60Ni and 59Co. Reorientation effects were found to be important to give the correct 2 + angular distributions for 24, 26Mg and could also account for the differences between the elastic scattering from the odd- A and adjacent even- A targets.