An extension of the RPA approach to include both 1p1h⊗phonon configurations and the single-particle continuum in a unified framework has been done using the consistent Green-function formalism. The microscopic calculations of the giant E1 resonance in 40Ca, 48Ca and 208Pb have been performed in the 1p1h + 2p2h + continuum approximation developed here. A reasonable agreement with experiment, including a description of the widths, has been obtained. We underesti- mate the experimental width values by 14% for 40Ca, 11% for 48Ca and 4% for 208Pb.

Original languageEnglish
Pages (from-to)90-108
Number of pages19
JournalNuclear Physics, Section A
Volume555
Issue number1
DOIs
StatePublished - 5 Apr 1993

    Scopus subject areas

  • Nuclear and High Energy Physics

ID: 74237022