Recently, a set of nine nonmagic nuclei with anomalous values of the $B(E2)$ ratio $B_{4/2}\equiv B(E2;4_1^{+}\to 2_1^{+})/B(E2;2_1^{+}\to 0_1^{+})$ < 1 were identified. Such values are outside the range allowed by current collective models. In the present work, the $B(E2;4_1^{+}\to 2_1^{+})$ values for two of these nuclei, ${}^{98}\mathrm{Ru}$ and ${}^{180}\mathrm{Pt}$, were re-measured to determine if the current literature values for these nuclei are correct. ${}^{98}\mathrm{Ru}$ was studied in a ${}^{27}\mathrm{Al}$(${}^{98}\mathrm{Ru}$,${}^{98}\mathrm{Ru}$${}^{*}$) Coulomb excitation experiment in inverse kinematics, while the lifetime of the $4_1^{+}$ state in ${}^{180}\mathrm{Pt}$ was measured in a ${}^{122}\mathrm{Sn}$(${}^{62}\mathrm{Ni}$, $4n$)${}^{180}\mathrm{Pt}$ recoil distance method (RDM) experiment. For both nuclei, the remeasured $B_{4/2}$ values are well above 1, removing the deviations from collective models.

• Received 8 May 2006

DOI:https://doi.org/10.1103/PhysRevC.74.024302