Quadrupole collectivity in neutron-rich Cd isotopes

In this contribution, nuclear structure studies with post-accelerated radioactive beams of the neutron-rich isotopes ^{122,123,124,126,128}Cd from the REX-ISOLDE facility at CERN are presented. The method employed is γ-ray spectroscopy with the MINIBALL array following 'safe' Coulomb excitation. For the even isotopes, the B(E2; 0⁺ →2⁺) values, as a common trend, are larger than predictions from state-of-the-art shell model calculations, but agree well with beyond-mean-field calculations. No striking evidence for a considerable deformation has been found. For ¹²³Cd, studied as first odd radioactive Cd isotope in the same way, the level scheme had to be revised. (author)