Abstract
Mean lifetimes of five levels in the S band and three levels in the ground-state band of ${}^{156}\mathrm{Dy},$ populated via the ${}^{124}\mathrm{Sn}{(}^{36}\mathrm{S},4n)$ reaction at $E=145\mathrm{MeV},$ were measured by the Doppler-shift attenuation technique using a line-shape analysis. The differential decay-curve method was applied for a lifetime determination. In contrast with earlier data, the present $B(E2)$ values in the yrast band do not indicate a reduction in the collectivity after the crossing between the S band and the ground-state band, and confirm the results of theoretical calculations using mean-field approaches.
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