Short-lived isomers in 192 Po and 194 Po

International audienceIsomeric states in 194 Po and 192 Po were studied at the velocity filter SHIP. The isotopes were produced in the fusion-evaporation reactions 141 Pr(56 Fe, p2n) 194 Po and 144 Sm(51 V, p2n) 192 Po. Several new γ-ray transitions were attributed to the isomers and γ-γ coincidences for both isomers were studied for the first time. The 459-keV transition earlier, tentatively proposed as de-exciting the isomeric level in 194 Po, was replaced by a new 248-keV transition, and the spin of this isomer was reassigned from (11 −) to (10 −). The de-excitation of the (11 −) isomeric level in 192 Po by the 154-keV transition was confirmed and a parallel de-excitation by a 733-keV (E3) transition to (8 +) level of the ground-state band was suggested. Moreover, side feeding to the (4 +) level of the ground-state band was proposed. The paper also discusses strengths of transitions de-exciting 11 − isomers in neighboring Po and Pb isotopes