NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = K.E.Karakatsanis Found 9 matches. 2022BO05 Phys.Lett. B 829, 137099 (2022) D.Bonatsos, K.E.Karakatsanis, A.Martinou, T.J.Mertzimekis, N.Minkov Microscopic origin of shape coexistence in the N=90, Z=64 region NUCLEAR STRUCTURE 176,178,180,182,184,186,188,190,192,194,196,198Po, 104,106,108,110,112,114,116,118,120,122,124,126,128,130Te, 70,72,74,76,78,80,82,84,86,88Zr; calculated single particle states using standard covariant density functional theory; deduced shape coexistence.
doi: 10.1016/j.physletb.2022.137099
2022BO16 Phys.Rev. C 106, 044323 (2022) D.Bonatsos, K.E.Karakatsanis, A.Martinou, T.J.Mertzimekis, N.Minkov Islands of shape coexistence from single-particle spectra in covariant density functional theory NUCLEAR STRUCTURE 68,70,90Zn, 70,72,92Ge, 72,74,92,94Se, 74,76,94,96Kr, 68,70,72,74,76,78,80,82,84,86,96,98Sr, 72,74,76,78,80,82,84,86,88,98,100Zr, 100,102Mo, 102,104Ru, 104,106Pd, 106,108Cd, 104,106,108,110,112,114,116,118,120,122,124,126,128,130,142,144,146,148Te, 144,146,148,150Xe, 146,148,150,152Ba, 148,150,152,154Ce, 150,152,154,156Nd, 152,154,156,158Sm, 154,156,158,160Gd, 156,158,160,162Dy, 158,160,162,164Er, 160,162,164,166Yb, 162,164,166,168Hf, 164,166,168,170W, 166,168,170,172Os, 170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200Pt, 172,174,176,178,180,182,184,186,188,190,192,194Hg, 174,176,178,180,182,184,186,188,190,192,194,196Pb, 176,178,180,182,184,186,188,190,192,194,196,198Po; calculated proton single-particle energy levels, potential energy surface. Covariant density functional theory with the DDME2 functional. Searched for regions with p-h excitations which are attributed to the shape coexistence. Islands of shape coexistence are identified at Z=82 and Z=50, and around the relevant neutron midshells N=104 and N=66.
doi: 10.1103/PhysRevC.106.044323
2022KA19 Phys.Rev. C 105, 064310 (2022) Signatures of shape phase transitions in krypton isotopes based on relativistic energy density functionals NUCLEAR STRUCTURE 76,78,80,82,84,86Kr; calculated triaxial quadrupole potential energy surfaces in (β, γ) planes, energies and collective wave functions contours in (β, γ) plane of first 2+ and 4+, second 2+, and first excited 0+ levels, B(E2) and B(E2) ratios, π2 for E0 transitions from the first and second excited 0+ states, E(first 4+)/E(first 2+), E(first 6+)/E(first excited 0+), E(second excited 0+)/E(first 2+), E(first excited 0+)/E(second excited 0+), and E(second 2+)/E(first 2+), fluctuations of the β and γ deformations, E(5) energy spectra and B(E2) transition strengths for 80,82Kr. Triaxial quadrupole constrained self-consistent mean-field (SCMF) calculations using DD-ME2 and DD-PC1 relativistic energy density functionals and pairing interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.105.064310
2022NO11 Phys.Rev. C 106, 064317 (2022) Collective-model description of shape coexistence and intruder states in cadmium isotopes based on a relativistic energy density functional NUCLEAR STRUCTURE 108,110,112,114,116Cd; calculated levels, J, π, potential energy surfaces as functions of the triaxial quadrupole deformations, protons and neutrons single-particle energies, B(E2), monopole transition strength, collective wave functions for 0+ and 2+ states. Calculations reproduced an observed decrease of the intruder bands toward the midshell N=66 as a function of nucleon number. Collective model with triaxial quadrupole Hamiltonian with parameters determined by the constrained self-consistent mean-field calculations within the relativistic Hartree-Bogoliubov method employing a universal energy density functional and a pairing force. Comparison to experimental results.
doi: 10.1103/PhysRevC.106.064317
2021MA25 Eur.Phys.J. A 57, 84 (2021) A.Martinou, D.Bonatsos, T.J.Mertzimekis, K.E.Karakatsanis, I.E.Assimakis, S.K.Peroulis, S.Sarantopoulou, N.Minkov The islands of shape coexistence within the Elliott and the proxy-SU(3) Models NUCLEAR STRUCTURE N=120-190; analyzed available data; deduced nucleon number systematics.
doi: 10.1140/epja/s10050-021-00396-w
2021MA26 Eur.Phys.J. A 57, 83 (2021) A.Martinou, D.Bonatsos, K.E.Karakatsanis, S.Sarantopoulou, I.E.Assimakis, S.K.Peroulis, N.Minkov Why nuclear forces favor the highest weight irreducible representations of the fermionic SU(3) symmetry NUCLEAR STRUCTURE 208Pb; analyzed available data; deduced prolate to oblate shape transitions.
doi: 10.1140/epja/s10050-021-00395-x
2021PR10 Int.J.Mod.Phys. E30, 2150054 (2021) Shape evolution of Hg isotopes within the covariant density functional theory NUCLEAR STRUCTURE 190,192,194,196,198,200Hg; calculated triaxial quadrupole energy surfaces, energy levels, J, π, B(E2) using a five-dimensional collective Hamiltonian (5DCH) model, with parameters determined by constrained self-consistent mean-field calculations based on the relativistic energy density functional DD-PC1, and a finite-range pairing interaction; deduced shape coexisting configurations.
doi: 10.1142/S0218301321500543
2020KA49 Phys.Rev. C 102, 034311 (2020) K.E.Karakatsanis, G.A.Lalazissis, V.Prassa, P.Ring Two-quasiparticle K isomers within the covariant density functional theory NUCLEAR STRUCTURE 170,172,174,176,178,180,182,184,186Hf, 172,174Er, 174,176Yb, 176,178Hf, 178,180W, 180,182Os, 184Pt, 186Hg, 188,208Pb; calculated Nilsson diagram for neutrons and protons close to the Fermi surface for 176Hf, single-particle energies of neutron and proton states in 208Pb and 176Hf, change in the energies of the 6+ and 8- isomers as function of pairing strength, quasineutron and quasiproton level energies, 6+ 2qp energies in A=170-180 even-even Hf isotopes, and in A=172-180, N=104 even-even isotones, energies of quasineutron levels for Z=172-180, N=104 isotones, energies of quasiproton levels and those of 8- 2qp states in A=170-186 even-A Hf isotopes, energies of 8- 2qp states in A=174-188, N=106 even-A isotones. Self-consistent mean-field approach within the relativistic Hartree-Bogoliubov framework, based on relativistic energy density functionals DD-ME2, DD-PC1, and DD-PC1 currents. Comparison with experimental data for 6+ and 8- low-energy high-K isomers in Z=68-82, N=98-112 even-A nuclei.
doi: 10.1103/PhysRevC.102.034311
2017KA11 Phys.Rev. C 95, 034318 (2017) K.Karakatsanis, G.A.Lalazissis, P.Ring, E.Litvinova Spin-orbit splittings of neutron states in N=20 isotones from covariant density functionals and their extensions NUCLEAR STRUCTURE 40Ca, 38Ar, 36S, 34Si; calculated proton densities with the functional DD-ME2, sizes and relative reductions of neutron p and f splittings using Skyrme SLy5 and Gogny D1S functionals and tensor extensions of these functionals, radial profiles of 2p1/2 and 1f5/2 neutron state for 40Ca and 34Si, spin-orbit splittings and their relative reductions for f and p neutron states without pairing and with TMR pairing, occupation probabilities of 2s1/2 proton state in 36S and 34Si for TMR pairing force, neutron 2p1/2 to 2p3/2 splitting using NL3, NL3*, FSUGold, DD-ME2, DD-MEδ, DD-PC1 and PC-PF1 functionals, radial dependence of total density and proton density for NL3 with and without pairing, change in single-particle energies of 1f5/2 and 1f7/2 and of 2p1/2 and 2p3/2 neutron states for N=20 isotones. Several relativistic functionals such as nonlinear meson-coupling, density-dependent meson coupling, and density-dependent point-coupling models, with separable TMR pairing force of finite range to determine spin-orbit (SO) splittings. Comparison with experimental data.
doi: 10.1103/PhysRevC.95.034318
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