The quest for novel modes of excitation in exotic nuclei

Abstract

This article provides an insight into several open problems in the quest for novel modes of excitation in nuclei with isospin asymmetry, deformation and finite temperature characteristic in stellar environment. Major unsolved problems include the nature of pygmy dipole resonances, the quest for various multipole and spin-isospin excitations both in neutron-rich and proton drip-line nuclei mainly driven by loosely bound nucleons, excitations in unstable deformed nuclei and evolution of their properties with the shape phase transition. Exotic modes of excitation in nuclei at finite temperatures characteristic for supernova evolution present open problems with possible impact in modeling astrophysically relevant weak interaction rates. All these issues challenge self-consistent many body theory frameworks at the frontiers of on-going research, including nuclear energy density functionals, both phenomenological and constrained by the strong interaction physics of QCD, models based on low-momentum two-nucleon interaction V_{low-k} and correlated realistic nucleon-nucleon interaction V_{UCOM}, supplemented by three-body force, as well as two-nucleon and three-nucleon interactions derived from the chiral effective field theory. Joined theoretical and experimental efforts, including research with radioactive isotope beams, are needed to provide insight into dynamical properties of nuclei away from the valley of stability, involving the interplay of isospin asymmetry, deformation and finite temperature.

arXiv comment14 pages, submitted to the Journal of Physics G special issue on Open Problems in Nuclear Structure (OPeNST)

References in corpus (40)

• Modern Theory of Nuclear Forces
• Theory of Core-Collapse Supernovae
• Effective Field Theory for Few-Nucleon Systems
• Exotic modes of excitation in atomic nuclei far from stability
• Relativistic Nuclear Energy Density Functionals: adjusting parameters to binding energies
• Model-independent low momentum nucleon interaction from phase shift equivalence
• A unitary correlation operator method
• Quasiparticle random phase approximation based on the relativistic Hartree-Bogoliubov model II: Nuclear spin and isospin excitations
• Particle-Number Projection and the Density Functional Theory
• Spin-isospin resonances: A self-consistent covariant description
• Relativistic quasiparticle time blocking approximation. Dipole response of open-shell nuclei
• Concentration of electric dipole strength below the neutron separation energy in N = 82 nuclei
• Di-neutron correlation and soft dipole excitation in medium mass neutron-rich nuclei near drip-line
• Continuum quasiparticle random phase approximation and the time dependent Hartree-Fock-Bogoliubov approach
• Isospin corrections for superallowed Fermi beta decay in self-consistent relativistic random phase approximation approaches
• Local nuclear energy density functional at next-to-next-to-next-to-leading order
• Unblocking of the Gamow-Teller strength in stellar electron capture on neutron-rich Germanium isotopes
• Deformed quasiparticle-random-phase approximation for neutron-rich nuclei using the Skyrme energy density functional
• Toroidal dipole resonances in the relativistic random phase approximation
• Isotopic dependence of the pygmy dipole resonance
• Relativistic quasiparticle time blocking approximation. II. Pygmy dipole resonance in neutron-rich nuclei
• Relativistic RPA in axial symmetry
• Calculation of stellar electron-capture cross sections on nuclei based on microscopic Skyrme functionals
• Inclusive charged-current neutrino-nucleus reactions calculated with the relativistic quasiparticle random phase approximation
• Second RPA and correlated realistic interactions
• Relativistic nuclear energy density functional constrained by low-energy QCD
• Dependence of single-particle energies on coupling constants of the nuclear energy density functional
• The fully self-consistent quasiparticle random phase approximation and its application to the isobaric analog resonances
• The Proton Electric Pygmy Dipole Resonance
• Low-energy multipole response in nuclei at finite temperature
• Collective multipole excitations based on correlated realistic nucleon-nucleon interactions
• Three-body resonant radiative capture reactions in astrophysics
• Continuum quasiparticle linear response theory using the Skyrme functional for multipole responses of exotic nuclei
• Low-energy dipole excitations towards the proton drip-line: doubly magic 48Ni
• RPA calculations with Gaussian expansion method
• Chiral pion-nucleon dynamics in finite nuclei: spin-isospin excitations
• Photon strength distributions in stable even-even molybdenum isotopes
• Particle vibrational coupling in covariant density functional theory
• Light nuclei from chiral EFT interactions
• Self-Consistent Description of Collective Excitations in the Unitary Correlation Operator Method

Cited by in corpus (13)

• Pygmy Resonances and Neutron Skins
• Low-energy isovector and isoscalar dipole response in neutron-rich nuclei
• Implications of PREX-2 on the electric dipole polarizability of neutron rich nuclei
• Low-energy dipole excitations in neon isotopes and N=16 isotones within the quasiparticle random phase approximation and the Gogny force
• Expanding Nuclear Physics Horizons with the Gamma Factory
• Connecting the Pygmy Dipole Resonance to the neutron skin
• Pygmy dipole resonance: collective features and symmetry energy effects
• Dipole response in 208Pb within a self-consistent multiphonon approach
• The nuclear energy density functional formalism
• Roles of deformation and neutron excess on the giant monopole resonance in neutron-rich Zr isotopes
• Nuclear collective dynamics within Vlasov approach
• ${}^{164}\mathrm{Pb}$: A possible heaviest $N=Z$ doubly magic nucleus
• Pygmies, Giants, and Skins