Isospin dependence of the microscopic JLM model

A systematic study of elastic proton and neutron scattering as well as (p,n ) charge exchange reactions was undertaken in the context of the JLM micros copic framework in order to test the isovector part of the potential. The s tudy included the stable nuclei Ca-48, Zr-90, Sn-120 and Pb-208 in the ener gy range of similar to 25-45 MeV and the halo nucleus He-6 at similar to 40 MeV. It was found that the stable nuclei data can be reproduced, by an adj ustment of the isovector part through a renormalization factor, lambda (iso v) similar to2-2.5. The required isovector adjustment for the halo nucleus data will be discussed. (C) 2001 Elsevier Science B.V. All rights reserved.