Survey of the (3He,t) reaction: Excitation of the isobaric analog of the giant dipole resonance
Abstract
The (3He,t) reaction at 130 and 170 MeV has been investigated on targets of 12C, 16O, 27Al, 28Si, 40Ca, 46Ti, and 90Zr. Data for the (3He,3He') reaction were measured simultaneously for reference purposes. Structure is observed in the spectra from the (3He,3He') and (3He,t) reactions at the expected positions of the giant quadrupole resonance and the isobaric analog of the giant dipole resonance, respectively. An angular distribution was measured for the suspected giant dipole resonance structure in the 40Ca(3He,t)40Sc reaction at 130 MeV. The data are reasonably described by a collective model calculation based on the Goldhaber-Teller model for the giant dipole resonance. Several other strong peaks at excitation energies below the giant dipole resonance are observed in the (3He,t) spectra. Most notable of these are the ones at the expected positions for analogs of well known 1+ states and 1ℏω stretched states in the targets. NUCLEAR REACTIONS 12C, 16O, 27Al, 28Si, 46Ti, 90Zr (3He,t) and (3He,3He') E=130, 170 MeV; measured d σd Ω (E, θ) giant resonances; stretched states.
- Publication:
-
Physical Review C
- Pub Date:
- March 1982
- DOI:
- 10.1103/PhysRevC.25.1253
- Bibcode:
- 1982PhRvC..25.1253T