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The results of precise measurements of the energies of the 2p32−1s12and 2p12−1s12 muonic X-ray transitions of 92Mo, 94Mo, 95Mo, 96Mo, 97Mo, 98Mo and 100Mo are reported. The data were analyzed in terms of the Barrett moments 〈rke−αr〉 of the nuclear charge distributions from which the equivalent nuclear radii Rk and the differences ΔRk between neighboring isotopes were computed. Systematic shell effects have been observed at the neutron numbers N = 50 and N = 56.

A precise elastic electron scattering experiment on 48 Ca relative to 40 Ca, covering a range in momentum transfer from 0.3 to 3.5 fm −1 , is presented. The charge distribution of 48 Ca and the charge difference distribution with respect to 40 Ca is deduced. Results from proton scattering experiments are used to evaluate the neutron distributions. The experimental findings are compared to former measurements and to HF-calculations. Preliminary results of measurements on the even Germanium-Isotopes are discussed.