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Title: Dynamical coupling of pygmy and giant resonances in relativistic Coulomb excitation

We study the Coulomb excitation of pygmy dipole resonances (PDR) in heavy ion reactions at 100 MeV/nucleon and above. The reactions Ni-68 + Au-197 and Ni-68 + Pb-208 are taken as 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. (C) 2016 The Authors. Published by Elsevier B.V.
Authors:
 [1] ;  [2] ;  [3] ;  [1]
  1. Texas A & M University-Commerce, Commerce, TX (United States). Dept. of Physics and Astronomy
  2. Technische Universitat, Darmstadt, (Germany). Institute for Nuclear Physics; GSI Helmholtz Centre for Heavy Ion Research
  3. Texas A & M University-Commerce, Commerce, TX (United States). Dept. of Physics and Astronomy; Texas A & M University, College Station, TX (United States). Dept. of Physics and Astronomy
Publication Date:
Grant/Contract Number:
FG02-08ER41533; 1415656
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 757; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Texas A & M Univ., Commerce, TX (United States)
Sponsoring Org:
USDOE; National Science Foundation (NSF); GSI Darmstadt; German Federal Ministry of Education and Research (BMBF)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; heavy-ion collisions; neutron-rich nuclei; strength function; dipole strength; isotopes; width; li-11
OSTI Identifier:
1250051
Alternate Identifier(s):
OSTI ID: 1280798