Bulg. J. Phys. vol.46 no.4 (2019), pp. 455-461

Two-Neutron Separation Energies within the Proxy-SU(3) Model

S. Sarantopoulou, A. Martinou, D. Bonatsos
Institute of Nuclear and Particle Physics, National Centre for Scientific Research "Demokritos'', GR-15310 Aghia Paraskevi, Attiki, Greece
Abstract. Proxy-SU(3) is an approximate symmetry appearing in heavy deformed nuclei. In SDANCA-2017 the foundation of proxy-SU(3), its parameter-free predictions for the collective deformation parameters β and γ, as well as for B(E2) ratios, have been discussed and its usefulness in explaining the dominance of prolate over oblate shapes in the ground states of even-even nuclei and the point of the prolate over oblate shape transition in the rare earths region has been demonstrated. In the present contribution, preliminary calculations for two-nucleon separation energies within this framework will be discussed.

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