Systematics of nuclear charge distributions in the region 40<=A<=100 deduced from elastic electron scattering and muonic x-ray measurements

The nuclear charge distribution and nuclear charge distribution differences have been investigated by 300 MeV elastic electron scattering at the Institut Fuer kernphysik, Universitaet Mainz. Muonic X-ray measurements yield complementary information to electron scattering results. Both experimental data are analysed in an almost model independent way. Preliminary data from the 1fsub(7/2) proton and neutron shell, measured at LAMPF and from the Sr-Mo region, measured at S.I.N. shows the same systematic behaviour as previous results in the Ni-region. As one result the systematic tendency of differences in nuclear radii between isotones and isotopes seems to be similar: there is a strong shell effect. One observes that the differences in radii are largest at the beginning of a neutron or proton shell and decrease linearly to the end of a shell. This tendency of the radii differences of (isotopes isotones) seems to be quite indendent of the (proton neutron) configuration. Some data of odd-even staggering effects will also be presented. (auth.)