Abstract
The ground state of the nucleus produced in the reaction was found at about () above the three-body breakup threshold. Angular correlations observed for decay products show prominent interference patterns allowing us to draw conclusions about the structure of low-energy excited states. We interpret the observed correlations as a coherent superposition of a broad state having a maximum at energy 4–6 MeV and a state above 6 MeV, setting both on top of the state “tail.” This anomalous level ordering indicates that the breakdown of the shell known in thus extends also to the system.
- Received 8 February 2012
DOI:https://doi.org/10.1103/PhysRevLett.108.202502
© 2012 American Physical Society