New signatures for octupole deformation in some actinide nuclei

Energies for three positive and three negative parity bands predicted by the extended coherent state model in ${}^{218,226}\mathrm{Ra},$ ${}^{228}\mathrm{Th},$ ${}^{232}\mathrm{Th},$ in four uranium even-mass isotopes, ${}^{232\ensuremath{-}238}\mathrm{U},$ and in ${}^{238}\mathrm{Pu},$ are calculated and used to point out new signatures for octupole deformation in ground as well as in $\ensuremath{\beta}$ and $\ensuremath{\gamma}$ bands. A beat pattern is found by using a new displacement energy function, which is more appropriate for a spectrum that exhibits large deviations from a linear $J(J+1)$ dependence.

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