Charge radii and structural evolution in Sr, Zr, and Mo isotopes

Abstract

The evolution of the ground-state nuclear shapes in neutron-rich Sr, Zr, and Mo isotopes, including both even-even and odd-A nuclei, is studied within a self-consistent mean-field approximation based on the D1S Gogny interaction. Neutron separation energies and charge radii are calculated and compared with available data. A correlation between a shape transition and a discontinuity in those observables is found microscopically. While in Sr and Zr isotopes the steep behavior observed in the isotopic dependence of the charge radii is a consequence of a sharp prolate-oblate transition, the smooth behavior found in Mo isotopes has its origin in an emergent region of triaxiality.

6 pages, 7 figures, to be published in Phys. Lett. B

References in corpus (4)

• Microscopic justification of the Equal Filling approximation
• Shell Structure of Exotic Nuclei
• Role of triaxiality in the ground state shape of neutron rich Yb, Hf, W, Os, and Pt isotopes
• Collectivity-induced quenching of signatures for shell closures

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