Yrast and non-yrast 2(+) states of Ce-134 and Nd-136 populated in relativistic Coulomb excitation

The first 2+ states in 134Ce and 136Nd and the second 2+ state in 136Nd were populated by Coulomb excitation at relativistic energies, and γ-rays were measured using the RISING setup at GSI. For 134Ce an indication of the excitation to the second 2+ state was observed. This experiment performed for the first time Coulomb excitation to second 2+ states with rare isotope beams at relativistic energies. For 136Nd the View the MathML sourceB(E2;21+→0+), View the MathML sourceB(E2;22+→0+), and View the MathML sourceB(E2;22+→21+) values relative to the previously known View the MathML sourceB(E2;21+→0+) value for 134Ce are determined as 81(10), 11(3) and 180(92) W.u., respectively. The results are discussed in the framework of geometrical models that indicate pronounced γ-softness in these nuclei.status: publishe