Shape coexistence and triaxiality in nuclei near 80Zr
Abstract
Total-Routhian-Surface calculations have been performed to investigate the shape evolutions of A80 nuclei, 80-84Zr, 76-80Sr and 84,86Mo. Shape coexistences of spherical, prolate and oblate deformations have been found in these nuclei. Particularly for the nuclei, 80Sr and 82Zr, the energy differences between two shape-coexisting states are less than 220 keV. At high spins, the g9/2 shell plays an important role for shape evolutions. It has been found that the alignment of the g9/2 quasi-particles drives nuclei to be triaxial.
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