Nuclear giant resonances and linear response

2007/03/14 by P.‐G. Reinhard, P. -G. Reinhard, Lu Guo +1 · 5 citations
Chemistry · Physics and Astronomy · #Amplitude #Atomic physics #Dipole #Excitation #Harmonic #Isoscalar #Isovector #Molecular Spectroscopy and Structure #Nuclear physics research studies #Nucleon #Physics #Quadrupole #Quantum chaos and dynamical systems #Quantum electrodynamics #Quantum mechanics #nucl-th

paper · pdf · doi:10.1140/epja/i2007-10366-9

published as Eur.Phys.J.A32:19-23,2007 · 5 pages

arxiv created 2007/03/14 · openalex publication_date 2007/04/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We search for nonlinear effects in nuclear giant resonances (GRs), in particular the isovector dipole and the isoscalar quadrupole modes. To that end, we employ a spectral analysis of time-dependent Hartree-Fock (TDHF) dynamics using Skyrme forces. Based on TDHF calculations over a wide range of excitation amplitudes, we explore the collectivity and degree of harmonic motion in these modes. Both GR modes turn out to be highly harmonic in heavy nuclei from A=100 on. There is no trace of a transition to irregular motion and multiple resonances are predicted. Slight anharmonicities are seen for light nuclei, particularly for ¹⁶O. These are mainly caused by the spin-orbit splitting.

Citations

• Self-consistent mean-field models for nuclear structure

Cited by

• Boost-invariant mean field approximation and the nuclear Landau-Zener effect
• Giant dipole resonance in Sm isotopes within TDHF method
• Shape evolution and collective dynamics of quasifission in the time-dependent Hartree-Fock approach
• Isotopic trends of quasifission and fusion-fission in the reactions Ca<mml:mprescripts/><mml:none/>48+Pu<mml:mprescripts/><mml:none/>239,244
• Microscopic description of large amplitude collective motion in the nuclear astrophysics context