336 citations · 1.5k across the 33 of their papers we have counts for
29 papers · 1 filter
Towards a self-consistent dynamical nuclear model
X. Roca-Maza, Y. F. Niu, G. Colò +1
Density Functional Theory (DFT) is a powerful and accurate tool exploited in Nuclear Physics to investigate the ground-state and some collective properties of nuclei along the whol…
Unified description of structure and reactions: implementing the Nuclear Field Theory program
Ricardo A. Broglia, Pier Francesco Bortignon, Francisco Barranco +3
The modern theory of the atomic nucleus results from the merging of the liquid drop (Niels Bohr and Fritz Kalckar) and of the shell model (Marie Goeppert Meyer and Axel Jensen), wh…
Properties of single-particle states in a fully self-consistent particle-vibration coupling approach
Li-Gang Cao, G. Colo, H. Sagawa +1
The properties of single-particle states in the magic nuclei Ca and Pb, in particular the energies, spectroscopic factors and the effective mass, have been studied i…
A microscopic model beyond mean-field: from giant resonances properties to the fit of new effective interactions
M. Brenna, G. Colò, X. Roca-Maza +3
A completely microscopic beyond mean-field approach has been elaborated to overcome some intrinsic limitations of self-consistent mean-field schemes applied to nuclear systems, suc…
Nuclear Symmetry Energy: constraints from Giant Quadrupole Resonances and Parity Violating Electron Scattering
X. Roca-Maza, B. K. Agrawal, P. F. Bortignon +8
Experimental and theoretical efforts are being devoted to the study of observables that can shed light on the properties of the nuclear symmetry energy. We present our new results…
The Gamow-Teller response within Skyrme random-phase approximation plus particle-vibration coupling
Yifei Niu, Gianluca Colo, Marco Brenna +2
Although many random-phase approximation (RPA) calculations of the Gamow-Teller (GT) response exist, this is not the case for calculations going beyond the mean-field approximation…
Microscopic theory of the γ-decay of nuclear giant resonances
Marco Brenna, Gianluca Colò, Pier Francesco Bortignon
In the past decades, the γ-decay of giant resonances has been studied using phenomenological models. In keeping with possible future studies performed with exotic beams, microscopi…
Constraints on the symmetry energy and on neutron skins from the pygmy resonances in 68Ni and 132Sn
Andrea Carbone, Gianluca Coló, Angela Bracco +4
Correlations between the behavior of the nuclear symmetry energy, the neutron skins, and the percentage of energy-weighted sum rule (EWSR) exhausted by the Pygmy Dipole Resonance (…
Nuclear single-particle states: dynamical shell model and energy density functional methods
P. F. Bortignon, G. Colò, H. Sagawa
We discuss different approaches to the problem of reproducing the observed features of nuclear single-particle (s.p.) spectra. In particular, we analyze the dominant energy peaks,…
Effects of the Tensor Force on the Multipole Response in Finite Nuclei
Li-Gang Cao, G. Colo', H. Sagawa +2
We present a thorough analysis of the effects of the tensor interaction on the multipole response of magic nuclei, using the fully self-consistent Random Phase Approximation (RPA)…
Giant resonances in exotic spherical nuclei within the RPA approach with the Gogny force
S. Péru, J. F. Berger, P. F. Bortignon
Theoretical results for giant resonances in the three doubly magic exotic nuclei Ni, Sn and Sn are obtained from Hartree-Fock (HF) plus Random Phase Approxim…
Microscopic Models for the Particle-Vibration Coupling in Exotic Nuclei
P. F. Bortignon
Recent results obtained, often in fruitful collaboration with Japanese colleagues in the study of the interplay between single-particle and collective degrees of freedom are review…
Effect of particle-phonon coupling on pairing correlations in nuclei
J. Terasaki, F. Barranco, P. -F. Bortignon +2
The influence of particle-phonon coupling on pairing correlations in nuclei is studied by solving the Dyson equation including the anomalous (pairing) Green function. We develop th…
Description of Double Giant Dipole Resonance within the Phonon Damping Model
C. A. Bertulani, P. F. Bortignon, V. Yu. Ponomarev +1
In a recent Letter [1] an overall agreement with the experimental data for the excitation of the single and double giant dipole resonances in relativistic heavy ion collision in 13…
QRPA plus Phonon Coupling Model and the Photoabsorbtion Cross Section for O
G. Colo`, P. F. Bortignon
We have calculated the electric dipole strength distributions in the unstable neutron rich oxygen isotopes O, in a model which include up to four quasi-particle-type c…
Solution of the Dyson equation for nucleons in the superfluid phase
J. Terasaki, F. Barranco, R. A. Broglia +2
We investigate the role the interweaving of surface vibrations and nucleon motion has on Cooper pair formation in spherical superfluid nuclei. A quantitative calculation of the sta…
Anharmonic properties of double giant dipole resonance
V. Yu. Ponomarev, P. F. Bortignon, R. A. Broglia +1
A systematic microscopic study of the anharmonic properties of the double giant dipole resonance (DGDR) has been carried out, for the first time, for nuclei with mass number sp…
The halo of the exotic nucleus 11Li: a single Cooper pair
F. Barranco, R. A. Broglia, G. Colo' +1
If neutrons are progressively added to a normal nucleus, the Pauli principle forces them into states of higher momentum. When the core becomes neutron-saturated, the nucleus expels…
On dipole compression modes in nuclei
G. Colo`, N. Van Giai, P. F. Bortignon +1
Isoscalar dipole strength distributions in spherical medium- and heavy-mass nuclei are calculated within random phase approximation (RPA) or quasiparticle RPA. Different Skyrme-typ…
Anharmonic collective excitation in a solvable model
G. F. Bertsch, P. F. Bortignon, K. Hagino
We apply the time-dependent variational principle, the nuclear field theory, and the boson expansion method to the Lipkin model to discuss anharmonicities of collective vibrational…
Restoration of Isospin Symmetry in Highly Excited Nuclei
H. Sagawa, P. F. Bortignon, G. Colo`
Explicit relations between the isospin mixing probability, the spreading width of the Isobaric Analog State (IAS) and the statistical decay width of th…
Response function beyond mean field of neutron-rich nuclei
G. Colo`, P. F. Bortignon, R. A. Broglia
The damping of single-particle and collective motion in exotic isotopes is a new topic and its study may shed light on basic problems of nuclear dynamics. For instance, it is known…
Widths of Isobaric Analog Resonances: a microscopic approach
G. Colo`, H. Sagawa, N. Van Giai +2
A self-consistent particle-phonon coupling model is used to investigate the properties of the isobaric analog resonance in Bi. It is shown that quantitative agreement with…
Effects of angular momentum projection on the nuclear partition function and the observation of the giant dipole resonance in hot nuclei
W. E. Ormand, P. F. Bortignon, R. A. Broglia
Procedures for projecting angular momentum in a model describing a hot nucleus that takes into account large-amplitude quadrupole fluctuations are discussed. Particular attention i…