Abstract
Isospin properties of dipole excitations in are investigated using the reaction and compared to data. The results indicate that the dipole excitations in the energy region of 6 to 9 MeV adhere to the scenario of the recently found splitting of the region of dipole excitations into two separated parts: one at low energy, being populated by both isoscalar and isovector probes, and the other at high energy, excited only by the electromagnetic probe. Relativistic quasiparticle time blocking approximation (RQTBA) calculations show a reduction in the isoscalar strength with an increase in excitation energy, which is consistent with the measurement.
- Received 11 September 2015
- Revised 25 February 2016
DOI:https://doi.org/10.1103/PhysRevC.94.024332
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