Dynamical Coupling of Pygmy and Giant Resonances in Relativistic Coulomb Excitation

Abstract

We study the Coulomb excitation of pygmy dipole resonances (PDR) in heavy ion reactions at 100 MeV/nucleon and above. The reactions 68Ni+197Au and 68Ni+208Pb are taken as a practical examples. Our goal is to address the question of the influence of giant resonances on the PDR as the dynamics of the collision evolves. We show that the coupling to the giant resonances affects considerably the excitation probabilities of the PDR, a result that indicates the need of an improved theoretical treatment of the reaction dynamics at these bombarding energies.

6 pages, 4 figures, accepted for publication in Physics Letters B

References in corpus (7)

• Exotic modes of excitation in atomic nuclei far from stability
• Pygmy Resonances and Neutron Skins
• Time-Dependent Density Functional Theory and the Real-Time Dynamics of Fermi Superfluids
• Relativistic Coulomb excitation within Time Dependent Superfluid Local Density Approximation
• Low-energy electric dipole response of Sn isotopes
• Excitation of soft dipole modes in electron scattering
• Pygmy resonances probed with electron scattering

Cited by in corpus (5)

• Indirect methods in nuclear astrophysics with relativistic radioactive beams
• Low-lying electric-dipole strengths of Ca, Ni, and Sn isotopes imprinted on total reaction cross sections
• Pygmy resonances and symmetry energy
• Nuclear resonance fluorescence of ${}^{208}$Pb in heavy-ion colliders
• Pigmy resonances, transfer, and separable potentials