Energy dependence of double giant resonances in pion double charge exchange
Abstract
The energy dependence of the giant dipole resonance built on the isobaric analog state was measured in pion-induced double charge exchange on 13C at incident pion energies of 140-295 MeV. The cross section increases with energy. The excitation function has a typical non-spin-flip signature, expected from simple considerations and verified by sequential model calculations. Three narrower previously reported low-lying states in 13O (Ex=3.1, 4.5, and 6.1 MeV) exhibit a spin-flip signature and may correspond to the giant Gamow-Teller strength built on the isobaric analog state.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 1993
- DOI:
- 10.1103/PhysRevLett.70.3209
- Bibcode:
- 1993PhRvL..70.3209W
- Keywords:
-
- 25.80.Gn;
- 24.30.Cz;
- 24.30.Gd;
- 27.20.+n;
- Pion charge-exchange reactions;
- Giant resonances;
- Other resonances;
- 6<
- =A<
- =19