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10 papers · 2 filters
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…
Low-lying dipole response: isospin character and collectivity in Ni, Sn and Pb
X. Roca-Maza, G. Pozzi, M. Brenna +2
The isospin character, the collective or single-particle nature, and the sensitivity to the slope of the nuclear symmetry energy of the low-energy isovector dipole response (known…
Relativistic mean field interaction with density dependent meson-nucleon vertices based on microscopical calculations
X. Roca-Maza, X. Viñas, M. Centelles +2
Although ab-initio calculations of relativistic Brueckner theory lead to large scalar isovector fields in nuclear matter, at present, successful versions of covariant density funct…
A simple method to compute excitation energies in variational many-body calculations
Giovanni Puddu
We propose a simple, easy to implement, variant of the EXCITED method for variational many-body calculations for excited states. We apply this method to the Hybrid Multideterminant…
Subtraction of the spurious translational mode from the RPA response function
Kazuhito Mizuyama, Gianluca Colò
It is well known that within self-consistent Random Phase Approximation (RPA) on top of Hartree-Fock (HF), the translational symmetry should be restored. Due to approximations at t…
Quasiparticle Renormalization and Pairing Correlations in Spherical Superfluid Nuclei
A. Idini, F. Barranco, E. Vigezzi
We present a detailed discussion of the solution of Nambu-Gor'kov equations in superfluid nuclei, which provide a consistent framework to deal with the interplay between particle-h…
Study of the neutron skin thickness of Pb in mean field models
X. Roca-Maza, M. Centelles, X. Viñas +1
We study whether the neutron skin thickness of Pb originates from the bulk or from the surface of the neutron and proton density distributions in mean field mod…
Study of the transition from pairing vibrational to pairing rotational regimes between magic numbers N=50 and N=82, with two-nucleon transfer
G. Potel, F. Marini, A. Idini +3
Absolute values of two-particle transfer cross sections along the Sn-isotopic chain from closed shell to closed shell (100Sn,132Sn) are calculated taking properly into account nucl…
Finite amplitude method for the quasi-particle-random-phase approximation
Paolo Avogadro, Takashi Nakatsukasa
We present the finite amplitude method (FAM) for superfluid systems. A Hartree-Fock-Bogoliubov code may be transformed into a code of the quasi-particle-random-phase approximation…
Neutron skin of 208Pb, nuclear symmetry energy, and the parity radius experiment
X. Roca-Maza, M. Centelles, X. Viñas +1
A precise determination of the neutron skin thickness of a heavy nucleus sets a basic constraint on the nuclear symmetry energy (the neutron skin thickness is the difference of the…