5 research outputs found
First Evidence of Axial Shape Asymmetry and Configuration Coexistence in Zn: Suggestion for a Northern Extension of the Island of Inversion
International audienceThe excited states of Zn were investigated via -ray spectroscopy following Cu decay. By exploiting - angular correlation analysis, the , , and states in Zn were firmly established. The -ray branching and mixing ratios for transitions de-exciting the , and states were measured, allowing for the extraction of relative values. In particular, the and transitions were observed for the first time. The results show excellent agreement with new microscopic large-scale shell-model calculations, and are discussed in terms of underlying shapes, as well as the role of neutron excitations across the gap. Enhanced axial shape asymmetry (triaxiality) is suggested to characterize Zn in its ground state. Furthermore, an excited band with a significantly larger softness in its shape is identified. A shore of the ``island of inversion'' appears to manifest above , previously thought as its northern limit in the chart of the nuclides
First Evidence of Axial Shape Asymmetry and Configuration Coexistence in Zn: Suggestion for a Northern Extension of the Island of Inversion
International audienceThe excited states of Zn were investigated via -ray spectroscopy following Cu decay. By exploiting - angular correlation analysis, the , , and states in Zn were firmly established. The -ray branching and mixing ratios for transitions de-exciting the , and states were measured, allowing for the extraction of relative values. In particular, the and transitions were observed for the first time. The results show excellent agreement with new microscopic large-scale shell-model calculations, and are discussed in terms of underlying shapes, as well as the role of neutron excitations across the gap. Enhanced axial shape asymmetry (triaxiality) is suggested to characterize Zn in its ground state. Furthermore, an excited band with a significantly larger softness in its shape is identified. A shore of the ``island of inversion'' appears to manifest above , previously thought as its northern limit in the chart of the nuclides