Abstract
The triple-α-particle breakup of states in the triple- continuum of has been investigated by way of coincident detection of all three particles of the breakup. The states have been fed in the decay of and , and the particles measured using a setup that covers all of the triple- phase space. Contributions from the breakup through the ground state as well as other channels—interpreted as breakup through excited energies in —have been identified. Spins and parities of triple- continuum states are deduced from the measured phase-space distributions for breakup through above the ground state by comparison to a fully symmetrized sequential -matrix description of the breakup. At around MeV in , the breakup is found to be dominated by strength breaking up through the ghost of the ground state with angular momentum between the first emitted particle and the intermediate nucleus. For energies above the MeV state, however, breakup of a state through the excited state dominates. Furthermore, the possibility of a excited state in the MeV region of is investigated.
10 More- Received 9 March 2009
DOI:https://doi.org/10.1103/PhysRevC.80.034316
©2009 American Physical Society