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NSR database version of April 29, 2024.

Search: Author = M.Brenna

Found 8 matches.

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2014BR16      Phys.Rev. C 90, 044316 (2014)

M.Brenna, G.Colo, X.Roca-Maza

Regularization of zero-range effective interactions in finite nuclei

NUCLEAR STRUCTURE ¹⁶O; calculated total energy in the finite system, density profiles using momentum-independent Skyrme force to regularize zero-range effective interactions. Discussed problem of the validity of the perturbative approach in finite nuclei.

doi: 10.1103/PhysRevC.90.044316
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2014CO20      Phys.Scr. 89, 054006 (2014)

G.Colo, P.F.Bortignon, M.Brenna, X.Roca-Maza, E.Vigezzi, K.Moghrabi, M.Grasso, K.Mizuyama

Progress in nuclear structure beyond the mean-field approximation

NUCLEAR STRUCTURE ^39,41Ca; calculated level density, spectroscopic factor, strength functions using nuclear density functional theory with particle-vibration coupling and other extensions. Compared with available data.

doi: 10.1088/0031-8949/89/5/054006
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2013BR03      Phys.Scr. T154, 014020 (2013)

M.Brenna, X.Roca-Maza, G.Colo, P.F.Bortignon, K.Mizuyama, G.Pozzi

Low-lying dipole response in stable and unstable nuclei

NUCLEAR STRUCTURE ⁶⁸Ni, ¹³²Sn, ²⁰⁸Pb; calculated total energy and rms charge radii, dipole response and strength functions, neutron and proton transition densities, RPA-pygmy states. Skyrme Hartree-Fock plus random phase approximation (RPA) predictions.

doi: 10.1088/0031-8949/2013/T154/014020
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2013RO08      Phys.Rev. C 87, 034301 (2013)

X.Roca-Maza, M.Brenna, B.K.Agrawal, P.F.Bortignon, G.Colo, L.-G.Cao, N.Paar, D.Vretenar

Giant quadrupole resonances in ²⁰⁸Pb, the nuclear symmetry energy, and the neutron skin thickness

NUCLEAR STRUCTURE ²⁰⁸Pb; calculated strength functions, neutron and proton transition densities, excitation energies of isoscalar and isovector giant quadrupole resonance (ISGQR and IVGQR), neutron skin thickness, symmetry energy. Macroscopic approach based on quantal harmonic oscillator model, and microscopic approach based on nonrelativistic and covariant energy density functionals (EDF) within the RPA. Comparison with experimental data.

doi: 10.1103/PhysRevC.87.034301
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2013RO20      Phys.Rev. C 88, 024316 (2013)

X.Roca-Maza, M.Brenna, G.Colo, M.Centelles, X.Vinas, B.K.Agrawal, N.Paar, D.Vretenar, J.Piekarewicz

Electric dipole polarizability in ²⁰⁸Pb: Insights from the droplet model

NUCLEAR STRUCTURE ²⁰⁸Pb; calculated electric dipole polarizability α_D as function of neutron skin thickness, correlation between α_D and symmetry energy, parity-violating asymmetry as function of α_D. Droplet model. Large set of relativistic and nonrelativistic nuclear mean-field models with modern nuclear energy density functionals (EDF). Comparison with experimental data.

doi: 10.1103/PhysRevC.88.024316
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2012BR02      Phys.Rev. C 85, 014305 (2012)

M.Brenna, G.Colo, P.F.Bortignon

Microscopic theory of the γ decay of nuclear giant resonances

NUCLEAR STRUCTURE ⁹⁰Zr, ²⁰⁸Pb; calculated energy of isoscalar giant quadrupole resonance (ISGQR), gamma decay width to ground state and the first low-lying octupole vibration, effect of intermediate dipole states on γ-decay width. Single particle states obtained within HF, vibrations using fully self-consistent RPA, and whole Skyrme force at the particle vibration vertices. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.014305
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2012NI03      Phys.Rev. C 85, 034314 (2012)

Y.F.Niu, G.Colo, M.Brenna, P.F.Bortignon, J.Meng

Gamow-Teller response within Skyrme random-phase approximation plus particle-vibration coupling

NUCLEAR STRUCTURE ⁶⁰Ni; calculated low-lying phonon levels, reduced transition probabilities. ^56,60Ni, ²⁰⁸Pb; calculated energies and widths of Gamow-Teller states, Gamow-Teller strength distributions with Skyrme random-phase approximation plus particle-vibration coupling. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.034314
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2012RO05      Phys.Rev. C 85, 024601 (2012)

X.Roca-Maza, G.Pozzi, M.Brenna, K.Mizuyama, G.Colo

Low-lying dipole response: Isospin character and collectivity in ⁶⁸Ni, ¹³²Sn, and ²⁰⁸Pb

NUCLEAR STRUCTURE ⁶⁸Ni, ¹³²Sn, ²⁰⁸Pb; calculated excitation energies of PDS, ISGDR and IVGDR, B(E1) strengths, neutron and proton transition densities, single particle levels for isoscalar and isovector transitions. Fully self-consistent nonrelativistic mean field (MF), Skyrme Hartree-Fock plus random phase approximation (RPA). Comparison with experimental data.

doi: 10.1103/PhysRevC.85.024601
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