NSR Query Results
Output year order : Descending NSR database version of May 3, 2024. Search: Author = A.Sanchez-Fernandez Found 3 matches. 2021BA17 Eur.Phys.J. A 57, 69 (2021); Erratum Eur.Phys.J. A 57, 124 (2021) B.Bally, A.Sanchez-Fernandez, T.R.Rodriguez Symmetry-projected variational calculations with the numerical suite TAURUS
doi: 10.1140/epja/s10050-021-00369-z
2021SA49 Phys.Rev. C 104, 054306 (2021) A.Sanchez-Fernandez, B.Bally, T.R.Rodriguez Variational approximations to exact solutions in shell-model valence spaces: Systematic calculations in the sd shell NUCLEAR STRUCTURE 24Ne; calculated total Hartree-Fock-Bogoliubov (HFB) and variation after particle-number projection (VAPNP) energies, isoscalar and isovector pairing amplitudes, quadrupole moments, B(E2), distribution in eigenstates of proton and neutron number operators of the intrinsic wave functions, total energy surfaces in (β2, γ) plane as a function of the triaxial deformation. 25Ne, 24Na; calculated HFB and VAPNP energies. 17,18,19,20,21,22,23,24,25,26,27O, 18,19,20,21,22,23,24,25,26,27,28,29Ne, 20,21,22,23,24,25,26,27,28,29,30,31Mg, 22,23,24,25,26,27,28,29,30,31,32,33Si, 24,25,26,27,28,29,30,31,32,33,34,35S, 26,27,28,29,30,31,32,33,34,35,36,37Ar; 18,20,22,24,26,28F, 20,22,24,26,28,30Na, 22,24,26,28,30,32Al, 24,26,28,30,32,34P, 26,28,30,32,34,36Cl, 28,30,32,34,36,38K; calculated energy differences with respect to the exact solution for unconstrained HFB, VAPNP and projected generator coordinate methods (PGCM) for even-even, even-odd nuclei and odd-odd nuclei in the sd shell; analyzed role of proton-neutron (pn) mixing and the quadrupole and pairing degrees of freedom in sd-shell nuclei. Calculations based on Hartree-Fock-Bogoliubov (HFB), variation after particle-number projection (VAPNP), and projected generator coordinate methods (PGCM), using the USD Hamiltonian.
doi: 10.1103/PhysRevC.104.054306
2019BA42 Phys.Rev. C 100, 044308 (2019) B.Bally, A.Sanchez-Fernandez, T.R.Rodriguez Variational approximations to exact solutions in shell-model valence spaces: Calcium isotopes in the pf shell NUCLEAR STRUCTURE 48Ca; calculated total energy surfaces (TES) as a function of the quadrupole degrees of freedom in the (β2, γ) plane, intrinsic pairing energy, particle-number projected, and particle-number and angular-momentum projected total energy surfaces as a function of the axial quadrupole (β2, γ=0 or 180 degrees) and nn-pairing degrees of freedom, levels, J, π, wave functions, B(E2), spectroscopic electric quadrupole moments, occupation numbers. 42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60Ca; calculated ground-state energies, energy difference between the approximate and exact ground-state energies computed with different variational approaches, excitation energies as a function of the angular momentum. Calculations used several projected generator coordinate methods (PGCM) in reproducing the exact eigenstates of the shell-model Hamiltonian KB3G in the pf-shell valence space.
doi: 10.1103/PhysRevC.100.044308
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