A revised B(E2;2 + 1 $ \rightarrow$ → 0 + 1 ) value in the semi-magic nucleus 210 Po
2017
The lifetimes of the $ 2^+_1$
, the $ 2^+_2$
and the $ 3^-_1$
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 $ 2^+_1$
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 $ 2^+_1$
, $ 4^+_1$
, $ 6^+_1$
, and $ 8^+_1$
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.
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