Coulomb excitation of 74,76Zn

The first experiment using radioactive beams post-accelerated by the HIE-ISOLDE facility has enabled to obtain a precise set of B(E2) transition probabilities in neutron-rich 74,76Zn isotopes. The resulting B(E2; 2+1 -> 0+1 ) values are consistent with those determined in earlier REX-ISOLDE measurements. While the B(E2; 4+1 -> 2+1 ) transition probability in 76Zn is also in agreement with earlier Coulomb-excitation results, the value obtained for 74Zn is considerably lower. For the first time, a spectroscopic quadrupole moment of the 2+1 state was measured for an exotic nucleus in this mass region. A detailed comparison is presented with large-scale shell-model and Monte Carlo shell-model calculations.

Automated summary

The first experiment using post-accelerated radioactive beams at the HIE-ISOLDE facility obtained precise B(E2) transition probabilities for neutron-rich 74,76Zn isotopes. The results are consistent with earlier measurements and comparisons with theoretical calculations were made.