On the structure of electric-dipole transitions

H. J. Wortche*

*Corresponding author for this work

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Abstract

Inelastic a scattering at intermediate energies provides a tool for highly selective excitation of isoscalar Giant Resonances. If combined with coincident measurements of decay photons and decay particles the (micro-) structure of the resonances becomes transparent. We have performed neutron decay measurements of the ISGDR in Zr-90, Sn-116 and Pb-208 and photon decay measurements of the Pygmy resonance in Ce-140 at kinematical conditions strongly favouring electric-dipole modes. In result, we got first-time evidence for the direct neutron decay component of the ISGDR in the nuclei under investigation and indications for a surprisingly clear splitting of the Pygmy El strength in Ce-140.

Original languageEnglish
Pages (from-to)27C-35C
Number of pages9
JournalNuclear Physics A
Volume788
DOIs
Publication statusPublished - 15-May-2007
Event2nd International Conference on Collective Motion in Nuclei Under Extreme Conditions - , Germany
Duration: 20-Jun-200623-Jun-2006

Keywords

  • STRENGTH
  • ENERGY
  • PB-208

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