Direct neutron decay of the isoscalar giant dipole resonance

M.D. Hunyadi, A.M. van den Berg, B.S. Davids, M.N. Harakeh, M.A. de Huu, H.J. Wörtche, M. Csatlós, J. Gulyas, A. Krasznahorkay, D. Sohler, U. Garg, M. Fujiwara, N. Blasi

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

The direct and statistical neutron decay of the isoscalar giant dipole resonance has been studied in Zr-90, Sn-116, and Pb-208 using the (alpha, alpha' n) reaction at a bombarding energy of 200 MeV. The spectra of fast decay neutrons populating valence hole states of the Z, N - 1 nuclei were analyzed, and estimates for the branching ratios were determined. The observation of the nucleon-direct-decay channels helped to select giant-resonance strengths and suppress the underlying background and continuum, which led to an indication of the existence of a new mode with L = 2 character, presumably the overtone of the isoscalar giant quadrupole resonance.

Original languageEnglish
Pages (from-to)1407-1414
Number of pages8
JournalPhysics of Atomic Nuclei
Volume70
Issue number8
DOIs
Publication statusPublished - Aug-2007

Keywords

  • INELASTIC ALPHA-SCATTERING
  • MONOPOLE RESONANCE
  • PROTON EXCITATION
  • COMPRESSION MODES
  • PB-208
  • NUCLEI
  • REGION
  • STATES

Cite this