Measurements of elastic neutron scattering from sup12C and 32S at 30.3 and 40.3 MeV: Limits on charge symmetry breaking in the nuclear mean field.

Angular distributions have been measured for TSS(n,n) and SC(n,n) at E/sub n/ = 30.3 and 40.3 MeV. Coupled channels analyses of these and lower energy data have been performed and the resulting potentials compared with those from similar analyses of proton scattering. Data for SYSi and UCa are also reanalyzed in the same manner. After correcting for purely Coulomb effects, twice the differences between the neutron and proton volume integrals per nucleon of the real potential, 2(J/sub n/-J/sub p//sup prime/), are as follows: 0 +- 24 ( SC), -30 +- 11 (SYSi), -29 +- 16 (TSS), and 8 +- 14 (UCa) MeV fmT. These results are used to put limits on charge symmetry breaking in the nuclear mean field.