Charge Radii And Nuclear Moments Around Sn-132

Laser spectroscopy measurements have been carried out on the very neutron-rich tin isotopes with the COMPLIS experimental setup. Using the 5s(2)5p(2) P-3(0) -> 5S(2)5p6S P-3(1), optical transition, hyperfine spectra of Sn126-132 and Sn-125m,Sn-127m,Sn-129m-131m where recorded for the first time. The variation of the mean square charge radius (delta < r(2) >) between these nuclei and nuclear moments of the isomers and the odd isotopes were thus measured. An odd even staggering which inverts at A = 130 is observed showing the appearance of a plateau on the delta < r(2) >. The magnetic moments measured are compared with the Schmidt values calculations. Moreover, from the quadrupole moments values, all these nuclei appear to be spherical.