Nuclear shapes: Quest for triaxiality in $^{86}$Ge and the shape of $^{98}$Zr

V. Werner , M. Lettmann , C. Lizarazo , W. Witt , D. Cline , M. Carpenter , P. Doornenbal , A. Obertelli (1) , N. Pietralla , G. Savard , P.A. Söderström , C.Y. Wu , S. Zhu

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

The region of neutron-rich nuclei above the N = 50 magic neutron shell closure encompasses a rich variety of nuclear structure, especially shapeevolutionary phenomena. This can be attributed to the complexity of sub-shell closures, their appearance and disappearance in the region, such as the N = 56 sub shell or Z = 40 for protons. Structural effects reach from a shape phase transition in the Zr isotopes, over shape coexistence between spherical, prolate, and oblate shapes, to possibly rigid triaxial deformation. Recent experiments in this region and their main physics viewpoints are summarized.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

V. Werner, M. Lettmann, C. Lizarazo, W. Witt, D. Cline, et al.. Nuclear shapes: Quest for triaxiality in $^{86}$Ge and the shape of $^{98}$Zr. 16th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics, Sep 2017, Shanghai, China. pp.02013, ⟨10.1051/epjconf/201817802013⟩. ⟨hal-02058412⟩