Abstract
The unstable nucleus , with its two -cluster configuration, is the doorway to the formation of heavier -cluster nuclei. Most importantly, its the precursor of the production of through the Hoyle state, a resonance state of three clusters, in the helium burning phase of a massive star. The nucleus exhibits a ground state band of rotational states established through scattering experiments. A subsequent precision particle- coincidence measurement of the electromagnetic transition between the excited states also corroborated the evidence for a highly deformed dumb-bell shaped structure of . A simultaneous phenomenological -matrix analysis of the measured capture reaction cross sections along with the elastic excitation function and phase shift data has been performed. The resulting reduced transition strength of compares well with the estimated experimental value of . The -matrix yield of the ) value is closer to the prediction of cluster model but about less than the ab initio result.
- Received 16 May 2022
- Accepted 24 June 2022
DOI:https://doi.org/10.1103/PhysRevC.106.034610
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