Nuclear moments and changes of the mean square nuclear charge radii in tin and indium

By collinear laser spectroscopy on stable tin isotopes an on radioactive neutron-deficient tin isotopes produced by heavy ion fusion as evaporation residual nuclei by measurement of hyperfine structure splittings and isotope shifts the nuclear moments and the change of the mean square nuclear charge radii were determined. The present thesis is a continuation of the first measurements on evaporation residual nuclei of the indium isotope chain (Z=49) and presents results for the isotopes sup(105,106)In as well as the results on the isotope chain of tin (Z=50), with the radioactive isotopes sup(108,109,110)Sn and the chain of the stable isotopes 112-124Sn. The radioactive tin and indium isotopes were produced in the reaction channels 98Mo (16O, 3n-6n) 111-108Sn and 94Mo (16O, p3n, p4n) sup(106,105)In. In tin the transition with lambda=452.5 nm (5p21S0->5p6s 1P1) was excited and fluorescence at lambda=326.3 nm (5p6s 1P1->5p21D2) detected. In indium the optical excitation ensued with lambda=451.1 nm (5p 2Psub(3/2)->6s 2Ssub(1/2)) and the fluorescence detection with lambda=410.2 nm (6s 2Ssub(1/2)->5p 2Psub(1/2)). The magnetic dipole moments derived from the hyperfine structure splittings of the indium spectra show for all isotopes of the whole chain 105-115In at each nuclear spin a relatively constant slope. From the slope of the measured spectroscopic quadrupole moments a constant static deformation of <β>=0.12 results. (orig./HSI)