Bulg. J. Phys. vol.49 no.1 (2022), pp. 089-096

N = 90 Shape Phase Transition: Increasing Axial Asymmetry Towards 148Ce

P. Koseoglou, V. Werner, N. Pietralla
Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
Abstract. In this proceedings the increasing axial asymmetry in the N = 90 isotopes with decreasing atomic number from 152Sm to 148Ce is shown. The placement of the nuclei of interest into the Interacting Boson Model symmetry triangle and the calculations of the approximate effective γ deformation shows the existence of some axial asymmetry, γappreff ≈ 10°, in 148Ce, while the N = 90 152Sm does not show any. Moreover, the shape evolution study of the cerium, neodymium and samarium chains shows the over all increasing axially asymmetry with decreasing atomic number.

doi: https://doi.org/10.55318/bgjp.2022.49.1.089

Full-text: PDF

go back