Microscopic HFB+QRPA predictions of dipole strength for astrophysics applications

Abstract

Large-scale QRPA calculations of the E1 strength are performed on top of HFB calculations in order to derive the radiative neutron capture cross sections for the whole nuclear chart. The spreading width of the GDR is taken into account by analogy with the second-RPA (SRPA) method. The accuracy of HFB+QRPA model based on various Skyrme forces with different pairing prescription and parameterization is analyzed. It is shown that the present model allows to constrain the effective nucleon-nucleon interaction with the GDR data and to provide quantitative predictions of dipole strengths.

21 pages, 9 figures

References in corpus (13)

• Mean-field description of ground-state properties of drip-line nuclei: Pairing and continuum effects
• Asymmetric Nuclear Matter from Extended Brueckner-Hartree-Fock Approach
• Large-scale QRPA calculation of E1-strength and its impact on the neutron capture cross section
• Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. II: Role of the effective mass
• Pairing and continuum effects in nuclei close to the drip line
• Continuum quasiparticle random phase approximation and the time dependent Hartree-Fock-Bogoliubov approach
• Effective density dependent pairing forces in the T=1 and T=0 channels
• QRPA plus Phonon Coupling Model and the Photoabsorbtion Cross Section for ${}^{18,20,22}$O
• Gamma-ray strength function and pygmy resonance in rare earth nuclei
• Rotational properties of ${}^{252,253,254}$No. Influence of pairing correlations
• Effect of large neutron excess on the dipole response in the region of the Giant Dipole Resonance
• Level densities and $\gamma$-strength functions in ${}^{148,149}$Sm
• Low-Lying 2+ states in neutron-rich oxygen isotopes in quasiparticle random phase approximation

Cited by in corpus (100)

• The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
• Origin of the Heaviest Elements: the Rapid Neutron-Capture Process
• Exotic modes of excitation in atomic nuclei far from stability
• Nuclear Equation of State from ground and collective excited state properties of nuclei
• Improved predictions of nuclear reaction rates with the TALYS reaction code for astrophysical applications
• Pygmy dipole resonance as a constraint on the neutron skin of heavy nuclei
• r-Process Nucleosynthesis: Connecting Rare-Isotope Beam Facilities with the Cosmos
• Reference Database for Photon Strength Functions
• Self-Consistent Description of Multipole Strength in Exotic Nuclei I: Method
• Di-neutron correlation and soft dipole excitation in medium mass neutron-rich nuclei near drip-line
• Databases and tools for nuclear astrophysics applications BRUSsels Nuclear LIBrary (BRUSLIB), Nuclear Astrophysics Compilation of REactions II (NACRE II) and Nuclear NETwork GENerator (NETGEN)
• Large-scale Continuum Random Phase Approximation predictions of dipole strength for astrophysical applications
• Theory of Nuclear Fission
• Photodisintegration of Ultra-High-Energy Cosmic Rays revisited
• Self-consistent description of multipole strength: systematic calculations
• Large-scale deformed quasiparticle random-phase approximation calculations of the $\gamma$-ray strength function using the Gogny force
• Emergence of pygmy dipole resonances: Magic numbers and neutron skins
• Mode-coupling and the pygmy dipole resonance in a relativistic two-phonon model
• Low-lying dipole response in the Relativistic Quasiparticle Time Blocking Approximation and its influence on neutron capture cross sections
• BCS-BEC crossover of neutron pairs in symmetric and asymmetric nuclear matter
• Giant Dipole Resonance Parameters of Ground-State Photoabsorption: Experimental Values with Uncertainties
• Information content of the low-energy electric dipole strength: correlation analysis
• Isotopic dependence of the pygmy dipole resonance
• Relativistic quasiparticle time blocking approximation. II. Pygmy dipole resonance in neutron-rich nuclei
• Low-energy electric dipole response in 120Sn
• The r-process nucleosynthesis: a continued challenge for nuclear physics and astrophysics
• First Measurement of the ${}^{96}$Ru(p,$\gamma$)${}^{97}$Rh Cross Section for the p-Process with a Storage Ring
• Low-energy limit of the radiative dipole strength in nuclei
• Low-energy dipole strength in 112,120Sn
• Electric and magnetic dipole modes in high-resolution inelastic proton scattering at $0^{\circ }$
• BRUSLIB and NETGEN: the Brussels nuclear reaction rate library and nuclear network generator for astrophysics
• Cross-Section Measurements of the 86Kr(g,n) Reaction to Probe the s-Process Branching at 85Kr
• First observation of low-energy γ-ray enhancement in the rare-earth region
• Self-consistent calculations of the strength function and radiative neutron capture cross section for stable and unstable tin isotopes
• Decay Pattern of Pygmy States Observed in Neutron-Rich 26 Ne
• Experimental study of the electric dipole strength in the even Mo nuclei and its deformation dependence
• The Proton Electric Pygmy Dipole Resonance
• Relativistic two-phonon model for low-energy nuclear response
• Test of the Brink-Axel hypothesis for the pygmy dipole resonance
• Electric and magnetic dipole strength in 112,114,116,118,120,124Sn
• Low-energy enhancement in the γ-ray strength functions of ${}^{73,74}$Ge
• Collective multipole excitations based on correlated realistic nucleon-nucleon interactions
• Experimentally constrained ($p,\gamma$)${}^{89}$Y and ($n,\gamma$)${}^{89}$Y reaction rates relevant to the $p$-process nucleosynthesis
• Enhanced low-energy $\gamma$-decay strength of ${}^{70}$Ni and its robustness within the shell model
• Investigation of alpha-induced reactions on the p nucleus 168Yb
• Low-energy monopole strength in exotic Nickel isotopes
• Experimental constraints on the $\gamma$-ray strength function in ${}^{90}$Zr using partial cross sections of the ${}^{89}$Y(p,$\gamma$)${}^{90}$Zr reaction
• The description of giant dipole resonance key parameters with multitask neural networks
• Evolution of the pygmy dipole resonance in nuclei with neutron excess
• Low-energy enhancement and fluctuations of $\gamma$-ray strength functions in ${}^{56,57}$Fe: test of the Brink-Axel hypothesis
• The intermediate neutron capture process II.Nuclear uncertainties
• Total and partial cross sections of the ${}^{112}$Sn($\alpha ,\gamma$)${}^{116}$Te reaction measured via in-beam $\gamma$-ray spectroscopy
• Solar r-process-constrained actinide production in neutrino-driven winds of supernovae
• Pygmy dipole strength close to particle-separation energies - the case of the Mo isotopes
• Impact of the phonon coupling on the photon strength function
• Nuclear Dipole Response in the Finite-Temperature Relativistic Time Blocking Approximation
• Gamma strength function and level density of ${}^{208}$Pb from forward-angle proton scattering at 295 MeV
• Determination of the photodisintegration reaction rates involving charged particles: systematical calculations and proposed measurements based on Extreme Light Infrastructure - Nuclear Physics (ELI-NP)
• Continuum quasiparticle random phase approximation for astrophysical direct neutron capture reaction of neutron-rich nuclei
• Dipole response in neutron-rich nuclei with new Skyrme interactions
• Low-energy dipole excitations towards the proton drip-line: doubly magic 48Ni
• Structure and decay of the pygmy dipole resonance in 26Ne
• alpha-induced reactions on 115In: cross section measurements and statistical model analysis
• Beyond-mean-field effects on the symmetry energy and its slope from the low-lying dipole response of ${}^{68}$Ni
• Synthesis of thorium and uranium in asymptotic giant branch stars
• Breaking of axial symmetry in excited heavy nuclei as identified in Giant Dipole Resonance data
• Self-consistent calculations within the Extended Theory of Finite Fermi Systems
• Nature of low-lying electric dipole resonance excitations in 74Ge
• Feasibility of studying astrophysically important charged-particle emission with the variable energy $\gamma$-ray system at the Extreme Light Infrastructure -- Nuclear Physics facility
• Experimentally constrained ${}^{165,166}\text{Ho}(n,\gamma )$ rates and implications for the $s$ process
• Neutron Capture in the r-Process -- Do We Know Them And Does It Make Any Difference?
• Non-iterative finite amplitude methods for E1 and M1 giant resonances
• Modeling photon--induced reactions on ${}^{233-238}$U actinide targets
• Excited-State Density Distributions of Neutron-Rich Unstable Nuclei
• Impact of level densities and $\gamma$-strength functions on $r$-process simulations
• New experimental constraint on the ${}^{185}$W($n,\gamma$)${}^{186}$W cross section
• Nuclear structure far from stability
• Systematics of semi-microscopic proton-nucleus optical potential at low energies relevant to nuclear astrophysics
• Neutron capture reactions relevant to s-process and p-process in the domain of the $N=50$ shell closure
• Continuum random-phase approximation for (n,γ) reactions on neutron-rich nuclei: collective effects and resonances
• Experimental nuclear astrophysics in Italy
• Symmetry breaking of Gamow-Teller and magnetic-dipole transitions and its restoration in calcium isotopes
• Multipole responses in fissioning nuclei and their uncertainties
• Microscopic nature of the photon strength function: stable and unstable Ni and Sn isotopes
• What to expect from microscopic nuclear modelling for k${}_{\mathrm{eff}}$ calculations ?
• Measurement of ${}^{144}$Sm(p,$\gamma$) cross-section at Gamow energies
• Constraining the Synthesis of the Lightest p Nucleus 74Se
• Microscopic folding model analysis of the radiative $(n,\gamma )$ reactions near the $Z=28$ shell-closure and the weak s-process
• Radiative Strength Functions for Dipole Transitions in Zr-90
• Possible existence of pygmy dipole resonance built on excited states in a neutron-rich ${}^{80}$Ge nucleus
• On microscopic theory of radiative nuclear reaction characteristics
• Impact of phonon coupling on the radiative nuclear reaction characteristics
• Capture Rates of Highly Degenerate Neutrons
• Dynamical ejecta of neutron star mergers with nucleonic weak processes I: Nucleosynthesis
• Numerical Convergence of Electromagnetic Responses with the Finite-Amplitude Method
• Comprehensive test of the Brink-Axel hypothesis in the energy region of the pygmy dipole resonance
• State-Selective High-Energy Excitation of Nuclei by Resonant Positron Annihilation
• Nuclear level densities and $\gamma$-ray strength functions of ${}^{87}\mathrm{Kr}$ -- First application of the Oslo Method in inverse kinematics
• Excitation function measurement of ${}^{144}$Sm($\alpha$,n) reaction at sub-Coulomb energies and detailed covariance analysis
• The Cross Section Calculation of the ${}^{112}$Sn($\alpha$,$\gamma$)${}^{116}$Te Reaction with Different Nuclear Models at the Astrophysical Energy Range