8 papers
The Confined beta-Soft rotor model in rare-earth nuclei
Jim A. Papadopoulos, T. J. Mertzimekis, P. Koseoglou +2
Contemporary theoretical descriptions of nuclear structure rely mainly on microscopic, single-particle frameworks often in competition with collective degrees of freedom, especiall…
Parameter-free deformation variables of the proxy-SU(3) symmetry in even-even actinide, superheavy and hyperheavy nuclei with Z=82-126, N=82-258
Dennis Bonatsos, V. K. B. Kota, Andriana Martinou +5
Superheavy and hyperheavy nuclei are one of the frontiers of nuclear structure nowadays, while also for many actinides rather limited experimental information exists. Therefore, th…
Parameter-free deformation variables of the proxy-SU(3) symmetry in even-even atomic nuclei with Z=28-82, N=28-126
Dennis Bonatsos, V. K. B. Kota, Andriana Martinou +5
The proxy-SU(3) approximation to the shell model, which restores the SU(3) symmetry of the 3-dimensional harmonic oscillator beyond the sd shell, predicts the collective deformatio…
Triaxial shapes in even-even nuclei: A theoretical overview
Dennis Bonatsos, Andriana Martinou, S. K. Peroulis +4
Triaxial shapes in even-even nuclei have been considered since the early days of the nuclear collective model. Although many theoretical approaches have been used over the years fo…
Robustness of the proxy-SU(3) symmetry in atomic nuclei and the role of the next highest weight irreducible representation
Dennis Bonatsos, Andriana Martinou, S. K. Peroulis +4
The proxy-SU(3) symmetry predicts, in a parameter-free way, the collective deformation variables beta and gamma in even-even atomic nuclei away from closed shells based on the high…
Preponderance of triaxial shapes in atomic nuclei predicted by the proxy-SU(3) symmetry
Dennis Bonatsos, Andriana Martinou, S. K. Peroulis +4
The proxy-SU(3) symmetry predicts, in a parameter-free way, based only on the Pauli principle and the short-range nature of the nucleon-nucleon interaction, non-vanishing values of…
Mean-field derived IBM-1 Hamiltonian with intrinsic triaxial deformation
Polytimos Vasileiou, Dennis Bonatsos, Theo J. Mertzimekis
An interacting-boson-model-1 (IBM-1) Hamiltonian, derived from self-consistent mean-field calculations using a Skyrme energy density functional is employed for the study of energy…
On the multipole mixing ratio of the keV transition from the 0.52 isomer of Hf
A. Chalil, T. J. Mertzimekis, A. Zyriliou +11
The nucleus Hf is one of the most primary of examples of an axially symmetric prolate rotor. Combined with the presence of high- isomers, spectroscopic studies can provi…