Abstract
Absolute branching ratios to unbound states in populated in the decays of and are reported. Clean sources of and were obtained using the isotope separation on-line (ISOL) method. The relative branching ratios to the different populated states were extracted using single-alpha as well as complete kinematics triple-alpha spectra. These two largely independent methods give consistent results. Absolute normalization is achieved via the precisely known absolute branching ratio to the bound 4.44 MeV state in . The extracted branching ratios to the unbound states are a factor of three more precise than previous measurements. Branching ratios in the decay of are also extracted and used to check the results.
- Received 19 August 2009
DOI:https://doi.org/10.1103/PhysRevC.80.044304
©2009 American Physical Society