Effects of Octupole Correlations for Positive-Parity States of Eyen-Even Nuclei in Rotational Regions

Abstract：

Within the framework of the U_sdpf(16) interacting boson model, the effects of the octupole degree of freedom p- and f-bosons on the positive-parity states of even-even nuclei in rotational regions are discussed. It is shown that configurations of an even number of p-and f-bosons can not only be incorporated into the usual ground state band, β-, γ-vibrational bands, but also naturally form the K^π=1⁺, 3⁺ rotation bands, etc.. This result is similar to that of the U_sds(15)-IBM. The result is consistent with that of U_sd-IBM. E₂ transition probabilities are discussed briefly.