Advertisement

Pre-equilibrium dipole strength in charge asymmetric peripheral heavy-ion reactions

  • D. Pierroutsakou
  • M. Di Toro
  • F. Amorini
  • V. Baran
  • A. Boiano
  • A. De Rosa
  • A. D'Onofrio
  • G. Inglima
  • M. La Commara
  • A. Ordine
  • N. Pellegriti
  • F. Rizzo
  • V. Roca
  • M. Romoli
  • M. Sandoli
  • M. Trotta
  • S. Tudisco

Abstract:

We report on the results obtained from the study of the 32S + 64Ni and 32S + 58Ni peripheral reactions at incident energies Elab = 288 MeV and Elab = 320 MeV, respectively. High-energy γ-rays were detected in an array of 8 seven-pack BaF2 clusters. Coincidence with complex fragments detected in 12 three-stage telescopes ensured the selection of peripheral reaction events. All of the relevant reaction parameters were kept constant with the exception of the different initial dipole moment caused by the different entrance channel charge asymmetry. While for quasi-elastic events no N/Z effect was observed in the differential γ-ray multiplicities of the two reactions, for deep-inelastic events a larger dipole γ-ray emission occurs during the more N/Z asymmetric reaction. A theoretical interpretation based on a collective Bremsstrahlung analysis of the reaction dynamics is presented.

PACS. 25.70.-z Low and intermediate energy heavy-ion reactions – 24.30.Cz Giant resonances – 23.20.-g Electromagnetic transitions – 25.70.Lm Strongly damped collisions 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2003

Authors and Affiliations

  • D. Pierroutsakou
    • 1
  • M. Di Toro
    • 2
  • F. Amorini
    • 2
  • V. Baran
    • 3
  • A. Boiano
    • 1
  • A. De Rosa
    • 1
  • A. D'Onofrio
    • 4
  • G. Inglima
    • 1
  • M. La Commara
    • 1
  • A. Ordine
    • 1
  • N. Pellegriti
    • 2
  • F. Rizzo
    • 2
  • V. Roca
    • 1
  • M. Romoli
    • 1
  • M. Sandoli
    • 1
  • M. Trotta
    • 1
  • S. Tudisco
    • 2
  1. 1.INFN, Sezione di Napoli, Napoli, ItalyIT
  2. 2.Università di Catania, Dipartimento di Fisica, Catania, ItalyIT
  3. 3.INFN, Laboratorio Nazionale del Sud, Catania, ItalyIT
  4. 4.Seconda Università di Napoli, Dipartimento di Scienze Ambientali, Napoli, ItalyIT

Personalised recommendations