Local suppression of collectivity in the N = 80 isotones at the Z = 58 subshell closure

Background: Recent data on N = 80 isotones have suggested that the proton pi(1g(7/2)) subshell closure at Z = 58 has an impact on the properties of low-lying collective states. Purpose: Knowledge of the B(E2; 2(1)(+) -> 0(1)(+)) value of Nd-140 is needed in order to test this conjecture. Method: The unstable, neutron-rich nucleus Nd-140 was investigated via projectile Coulomb excitation at the REX-ISOLDE facility with the MINIBALL spectrometer. Results: The B(E2) value of 33(2) W.u. expands the N = 80 systematics beyond the Z = 58 subshell closure. Conclusions: The measurement demonstrates that the reduced collectivity of Ce-138 is a local effect possibly due to the Z = 58 subshell closure and requests refined theoretical calculations. The latter predict a smoothly increasing trend.