A revised B(E2; 21+ RT 01+) value in the semi-magic nucleus ²¹0Po

The lifetimes of the 21+ , the 22+ and the 31- states of ²¹0Po have been measured in the ²08Pb(¹²C,¹0Be)²¹0Po transfer reaction by the Doppler-shift attenuation method. The result for the lifetime of the 21+ state is about three times shorter than the adopted value. However, the new value still does not allow for a consistent description of the properties of the yrast 21+ , 41+ , 61+ , and 81+ states of ²¹0Po in the framework of nuclear shell models. Quasi-particle Phonon Model (QPM) calculations also cannot overcome this problem thus indicating the existence of a peculiarity which is neglected in both theoretical approaches.