https://doi.org/10.1051/epjconf/202430404004
Nuclear shape / phase transitions in the N = 40, 60, 90 regions
1 Nuclear Physics Institute, Czech Academy of Sciences, CZ-250 68 Rˇ ež near Prague, Czech Republic
2 Department of Physics, VŠB – Technical University Ostrava, 17. listopadu 2172/15, CZ-708 00 Ostrava, Czech Republic
3 Institute of Nuclear and Particle Physics, N.C.S.R. Demokritos, GR-15310 Aghia Paraskevi, Attiki, Greece
4 Universite Grenoble 1, CNRS, LPSC, Institut Polytechnique de Grenoble, IN2P3, F-38026 Grenoble, France
* e-mail: petrellis@ujf.cas.cz
** e-mail: deceased
Published online: 8 October 2024
We investigate the isotopes of Se, Zr, Mo and Nd in the regions with N = 40, 60 and 90, where a first-order shape / phase transition, from spherical to deformed, can be observed. The signs of phase transitional behavior become evident by examining structure indicators, such as certain energy ratios and B(E2) transition rates and, in particular, how they evolve with neutron number. Microscopic mean-field calculations using the Skyrme-Hartree-Fock + Bardeen-Cooper-Schrieffer framework also reveal structural changes when considering the evolution of the resulting potential energy curves as functions of deformation. Finally, macroscopic calculations, using the Algebraic Collective Model, specifically for 74Se, 102Mo and 150Nd, after fitting its parameters to experimental spectra, result in potentials that resemble some of the potentials proposed in the framework of the Bohr Hamiltonian to describe shape transitions in nuclei. A more detailed account can be found in [1].
© The Authors, published by EDP Sciences, 2024
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