84 citations · 572 across the 47 of their papers we have counts for
47 papers
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…
Seven years of the proxy-SU(3) shell model symmetry
Dennis Bonatsos, Andriana Martinou, S. K. Peroulis +2
The proxy-SU(3) symmetry was first presented in HINPw4 in Ioannina in May2017, justified within the Nilsson model and applied to parameter-free predictions of the collective variab…
Prolate-oblate shape transitions and O(6) symmetry in even-even nuclei: A theoretical overview
Dennis Bonatsos, Andriana Martinou, S. K. Peroulis +2
Prolate to oblate shape transitions have been predicted in an analytic way in the framework of the Interacting Boson Model (IBM), determining O(6) as the symmetry at the critical p…
Algebraic solutions for quantum phase transitions in the proton-neutron interacting boson model
M. M. Hammad, Andriana Martinou, Dennis Bonatsos
A simple systematic procedure to construct the proton-neutron unitary, , orthogonal, , and quasi-spin $\text{su}_{\text{sd}}^{πν…
Shape coexistence in even-even nuclei: A theoretical overview
Dennis Bonatsos, Andriana Martinou, S. K. Peroulis +2
The last decade has seen a rapid growth of our understanding of the microscopic origins of shape coexistence, assisted by the new data provided by the modern radioactive ion beam f…
Signatures for shape coexistence and shape/phase transitions in even-even nuclei
Dennis Bonatsos, Andriana Martinou, S. K. Peroulis +2
Systematics of B(E2) transition rates connecting the first excited 0+ state to the first excited 2+ state of the ground state band in even-even nuclei indicates that shape coexiste…
The proxy-SU(3) symmetry in atomic nuclei
Dennis Bonatsos, Andriana Martinou, S. K. Peroulis +2
The microscopic origins and the up-to-now predictions of the proxy-SU(3) symmetry model of atomic nuclei are reviewed. Starting from the experimental evidence for the special role…
Islands of shape coexistence: theoretical predictions and experimental evidence
Andriana Martinou, Dennis Bonatsos, S. K. Peroulis +3
Parameter-free theoretical predictions based on a dual shell mechanism within the proxy-SU(3) symmetry of atomic nuclei, as well as covariant density functional theory calculations…
Islands of shape coexistence from single-particle spectra in covariant density functional theory
Dennis Bonatsos, K. E. Karakatsanis, Andriana Martinou +2
Using covariant density functional theory with the DDME2 functional and labeling single-particle energy orbitals by Nilsson quantum numbers, a search for particle-hole (p-h) excita…
Islands of shape coexistence in proxy-SU(3) symmetry and in covariant density functional theory
Dennis Bonatsos, K. E. Karakatsanis, Andriana Martinou +2
Shape coexistence in even-even nuclei is observed when the ground state band of a nucleus is accompanied by another K=0 band at similar energy but with radically different structur…
Microscopic origin of shape coexistence in the N=90, Z=64 region
Dennis Bonatsos, K. E. Karakatsanis, Andriana Martinou +2
A microscopic explanation of the nature of shape coexistence in the N=90, Z=64 region is suggested, based on calculations of single particle energies through standard covariant den…
Unified picture of nucleon pairs playing leading roles in nuclear collectivity
Dennis Bonatsos, Andriana Martinou, I. E. Assimakis +3
Proxy-SU(3) symmetry is an approximation scheme extending the Elliott SU(3) algebra of the sd shell to heavier shells. When introduced in 2017, the approximation had been justified…
Connecting the proxy-SU(3) symmetry to the shell model
Dennis Bonatsos, Andriana Martinou, I. E. Assimakis +3
Proxy-SU(3) symmetry is an approximation scheme extending the Elliott SU(3) algebra of the sd shell to heavier shells. When introduced in 2017, the approximation had been justified…
Highest weight irreducible representations favored by nuclear forces within SU(3)-symmetric fermionic systems
Andriana Martinou, S. Sarantopoulou, K. E. Karakatsanis +1
The consequences of the attractive, short-range nucleon-nucleon (NN) interaction on the wave functions of nuclear models bearing the SU(3) symmetry are reviewed. The NN interaction…
The islands of shape coexistence within the Elliott and the proxy-SU(3) Models
Andriana Martinou, Dennis Bonatsos, T. J. Mertzimekis +5
A novel dual-shell mechanism for the phenomenon of shape coexistence in nuclei within the Elliott SU(3) and the proxy-SU(3) symmetry is proposed for all mass regions. It is suppose…
Why nuclear forces favor the highest weight irreducible representations of the fermionic SU(3) symmetry
Andriana Martinou, Dennis Bonatsos, K. E. Karakatsanis +4
The consequences of the attractive, short-range nucleon-nucleon (NN) interaction on the wave functions of the Elliott SU(3) and the proxy-SU(3) symmetry are discussed. The NN inter…
Proxy-SU(3) symmetry in the shell model basis
Andriana Martinou, Dennis Bonatsos, N. Minkov +4
The proxy-SU(3) symmetry has been proposed for spin-orbit like nuclear shells using the asymptotic deformed oscillator basis for the single particle orbitals, in which the restorat…
Parameter-free predictions for the collective deformation variables beta and gamma within the pseudo-SU(3) scheme
Dennis Bonatsos, Andriana Martinou, S. Sarantopoulou +3
The consequences of the short range nature of the nucleon-nucleon interaction, which forces the spatial part of the nuclear wave function to be as symmetric as possible, on the pse…
Breaking SU(3) spectral degeneracies in heavy deformed nuclei
Dennis Bonatsos, I. E. Assimakis, Andriana Martinou +3
Symmetries are manifested in nature through degeneracies in the spectra of physical systems. In the case of heavy deformed nuclei, when described in the framework of the Interactin…
Connection between Elliott SU(3) and spherical shell model bases
A. Martinou, N. Minkov, S. Sarantopoulou +3
In the Elliott SU(3) symmetry scheme the single particle basis is derived from the isotropic harmonic oscillator Hamiltonian in the Cartesian coordinate system. These states are tr…