Multiple reflection-asymmetric type band structures in $^{220}Th$ and dinuclear model

Details Multiple reflection-asymmetric type band structures in $^{220}Th$ and dinuclear model Multiple reflection-asymmetric type band structures in $^{220}Th$ and dinuclear model

2010-01-29

arxiv.org/abs/1001.5351v2

Physics

Nuclear Physics

Nuclear Theory

17 pages, 7 figures

Scientific paper

The negative parity bands in $^{220}$Th are analyzed within the dinuclear system model which was previously used for describing the alternating-parity bands in deformed actinides. The model is based on the assumption that cluster type shapes are produced by the motion of nuclear system in the mass-asymmetry coordinate. To describe the reflection-asymmetric collective modes characterized by nonzero values of $K$, the intrinsic excitations of clusters are taken into account. The angular momentum dependence of the parity splitting and the staggering behavior of the $B(E1)/B(E2)$ ratios as functions of angular momentum are explained.

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