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The hyperfine structure and isotope shift of the neutron-rich tin isotopes have been measured across the N=82 shell closure for the very first time. The work has been carried out at ISOLDE, CERN by high-resolution collinear laser spectroscopy. The charge radii and electromagnetic moments of ground and isomeric states along 107-134Sn show regularities which can be explained within the framework of "simple structure in complex nuclei" [1]. The quadrupole moments of the 11/2- states, determined with much higher precision than previous studies, have been found to follow a characteristic trend similar to the one observed in the neighbouring cadmium isotopes [2]. The charge radius of the doubly magic plus one neutron nucleus 133Sn together with the one of 134Sn enable a conclusion on the expected "kink" in the radii trend at the N=82 shell closure.
[1] J. Wood, Physics 6, 52 (2013).
[2] D. T. Yordanov et al., Phys. Rev. Lett. 110, 192501 (2013).
