Negative-parity spectra for mass-18 nuclei in the dynamic-interaction propagator approach

1977
11 pages
Published in:
  • Nucl.Phys.A 289 (1977) 386-396
  • Published: 1977

Citations per year

1980198619921998200410
Abstract: (Elsevier)
The energy spectra and two-particle strengths of negative-parity states in mass-18 nuclei are calculated by using a Green-function formulation which includes energy-dependent two-particle interactions. The energy dependence is induced by the dynamic exchange of the octupole phonon which appears at 6.13 MeV in 16 O. This state is described within a normal static particle-hole RPA. The two-body interaction parameters are chosen to provide the correct phonon energy and reasonable negative parity mass-17 and positive-parity mass-18 spectra. The negative-parity states are then calculated in a parameter-free way. In order to avoid redundant solutions or ghosts, the fermion lines must be dressed in a way consistent with the phonon exchange.