Abstract
Radioactive beams of and were used to populate the resonant states , and in the unbound and nuclei, respectively, by means of proton elastic scattering reactions in inverse kinematics. Based on their large proton spectroscopic factor values, the resonant states in can be viewed as a core of plus a proton in the or shell and a neutron in . Experimental energies were used to derive the strength of the - and - proton-neutron interactions. It is found that the former changes by 40% compared with the mirror nucleus , and the latter changes by 10%. This apparent symmetry breaking of the nuclear force between mirror nuclei finds explanation in the role of the large coupling to the continuum for the states built on an proton configuration.
- Received 22 July 2013
- Revised 17 May 2014
DOI:https://doi.org/10.1103/PhysRevC.90.014307
©2014 American Physical Society