Abstract
The double isovector giant dipole state has been observed in the (,)Δ=+2 double-charge-exchange reaction on , , , , , and . The resonances observed in the (,) reaction are closely related via Coulomb displacement energy and isospin symmetry to the resonances measured in the inverse (,) reaction on the same nuclei. The new observations provide a direct determination of the upper isospin component of the double giant dipole state, which is generally very weak in the (,) reaction. The comparison between the double dipole in the two double-charge-exchange modes gives valuable information on the isospin splitting and the Pauli-blocking effects for isotensor transitions.
- Received 5 March 1992
DOI:https://doi.org/10.1103/PhysRevC.45.2723
©1992 American Physical Society