Particle?Hole Description of Dipole States in17O

Abstract

The particle-hole model has been applied to the 170 nucleus to study the electric dipole states below the giant dipole resonance (GDR). Comparison is made with the most recent photonuclear data for this nucleus and an E 1 assignment for the observed strength at 15· 1 Me V in the photoproton cross section is discussed. The WMBH residual interaction used in this calculation produces more T> strength below the GDR than predicted in other calculations using the Tabakin, Soper or Kuo-Brown interactions.