NSR Query Results
Output year order : Descending NSR database version of April 29, 2024. Search: Author = D.Negrea Found 10 matches. 2022NE02 Phys.Rev. C 105, 034325 (2022) D.Negrea, N.Sandulescu, D.Gambacurta Proton-neutron pairing and binding energies of nuclei close to the N=Z line NUCLEAR STRUCTURE 24,26,28Mg, 28,30,32Si, 32,34,36S, 36,38,40Ar, 40,42,44Ca, 44,46,48Ti, 48,50,52Cr, 52,54,56Fe, 56,58,60Ni, 60,62,64Zn, 64,66,68Ge, 68,70,72Se, 72,74,76Kr, 76,78,80Sr, 80,82,84Zr, 84,86,88Mo, 88,90,92Ru, 92,94,96Pd, 96,98,100Cd, 100Sn; calculated binding energies for N=Z, N=Z+2 and N=Z+4 nuclei using different pairing forces and approximations, interaction energies and pairing energies, and compared with experimental binding energies; analyzed contribution of isovector and isoscalar proton-neutron pairing to the binding energies of even-even nuclei. 64Ge; calculated pairing energy, interaction energy and self-energy, diagonal and nondiagonal matrix elements of the isovector and isoscalar pairing force. Mean-field approach with Skyrme-type functional and quartet condensation model (Skyrme-HF+QCM calculations).
doi: 10.1103/PhysRevC.105.034325
2021SE04 Eur.Phys.J. A 57, 12 (2021) A.G.Serban, D.R.Nichita, D.Negrea, V.V.Baran Structure of the quartetting ground state of N=Z nuclei NUCLEAR STRUCTURE 104Te, 108Xe, 112Ba, 116Ce, 120Nd, 124Sm, 128Pm; analyzed available data; calculated correlation energies, overlaps between states, ground state structures compatible with the particle number and isospin symmetries.
doi: 10.1140/epja/s10050-020-00309-3
2020BA57 Phys.Rev. C 102, 061301 (2020) V.V.Baran, D.R.Nichita, D.Negrea, D.S.Delion, N.Sandulescu, P.Schuck Bridging the quartet and pair pictures of isovector proton-neutron pairing
doi: 10.1103/PhysRevC.102.061301
2018NE10 Phys.Rev. C 98, 064319 (2018) D.Negrea, P.Buganu, D.Gambacurta, N.Sandulescu Isovector and isoscalar proton-neutron pairing in N > Z nuclei NUCLEAR STRUCTURE 20,22,24,26Ne, 24,26,28,30Mg, 28,30,32,34Si, 44,46,48,50Ti, 48,50,52,54Cr, 52,54,56,58Fe, 104,106,108,110Te, 108,110,112,114Xe, 112,114,116,118Ba; calculated isovector and isoscalar nucleon pairing energies, and errors in the correlation energies using extended quartet condensation model (QCM) applied for a set of nucleons moving in a fixed mean field generated by Skyrme-HF calculations.
doi: 10.1103/PhysRevC.98.064319
2017NE07 Prog.Theor.Exp.Phys. 2017, 073D05 (2017) D.Negrea, N.Sandulescu, D.Gambacurta Isovector and isoscalar pairing in odd-odd N = Z nuclei within a quartet approach NUCLEAR STRUCTURE N=8-32; calculated energy difference between the lowest T=1 and T=0 isospin states as function of N=Z=A/2, pairing energies.
doi: 10.1093/ptep/ptx071
2015SA25 Rom.J.Phys. 60, 805 (2015) Pairing, Quartet Condensation and Wigner Energy in Nuclei NUCLEAR STRUCTURE A=20-104; calculated the strength of the symmetry energy term, isovector pairing interaction. Mean-field models.
2015SA53 Phys.Lett. B 751, 348 (2015) N.Sandulescu, D.Negrea, D.Gambacurta Proton-neutron pairing in N = Z nuclei: Quartetting versus pair condensation NUCLEAR STRUCTURE 16O, 40Ca, 100Sn, 20Ne, 24Mg, 28Si, 44Ti, 48Cr, 52Fe, 104Te, 108Xe, 112Ba; calculated proton-neutron pairing and correlation energies using the pair-quartet condensation model (PQCM). Comparison with available data.
doi: 10.1016/j.physletb.2015.10.063
2014NE10 Phys.Rev. C 90, 024322 (2014) Isovector proton-neutron pairing and Wigner energy in Hartree-Fock mean field calculations NUCLEAR STRUCTURE A=24-100; calculated even-even to odd-odd mass differences, strength of the symmetry energy term, contribution of the Wigner energy relative to standard symmetry energy. Isovector proton-neutron pairing in self-consistent mean field calculations, where mean field is generated by SkyrmeHartree-Fock functional. Comparison with experimental data.
doi: 10.1103/PhysRevC.90.024322
2012SA24 Phys.Rev. C 85, 061303 (2012) N.Sandulescu, D.Negrea, J.Dukelsky, C.W.Johnson Quartet condensation and isovector pairing correlations in N=Z nuclei NUCLEAR STRUCTURE 20Ne, 24Mg, 28Si, 32S, 44Ti, 48Cr, 52Fe, 104Te, 108Xe, 112Ba; calculated correlation energies for the exact shell model diagonalizations (SM), quartet condensation model (QCM), and the two PBCS approximations using isovector pairing forces extracted from standard shell model interactions with spherical single-particle states, and isovector pairing force of seniority type with axially-deformed single-particle states.
doi: 10.1103/PhysRevC.85.061303
2012SA47 Phys.Rev. C 86, 041302 (2012) N.Sandulescu, D.Negrea, C.W.Johnson Four-nucleon α-type correlations and proton-neutron pairing away from the N=Z line NUCLEAR STRUCTURE 20,22,24,26,28,30Ne, 24,26,28,30,32Mg, 28,30,32Si, 44,46,48,50Ti, 48,50,52,54Cr, 104,106,108,110,112Te, 108,110,112,114Xe; calculated pairing correlation energies using exact diagonalization, the quartet condensation model (QCM), and the PBCS1 approximation. Importance of four-nucleon correlations of α type in systems with neutron-proton pairing.
doi: 10.1103/PhysRevC.86.041302
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