Abstract
The cascading 3.21 and 4.44 MeV electric quadrupole transitions have been observed from the Hoyle state at 7.65 MeV excitation energy in , excited by the reaction at 10.7 MeV proton energy. From the proton- triple coincidence data, a value of was obtained for the radiative branching ratio. Using our results, together with from Eriksen et al. [Phys. Rev. C 102, 024320 (2020)] and the currently adopted values, the radiative width of the Hoyle state is determined as . This value is about 34% higher than the currently adopted value and will impact models of stellar evolution and nucleosynthesis.
- Received 18 December 2019
- Revised 26 July 2020
- Accepted 22 September 2020
DOI:https://doi.org/10.1103/PhysRevLett.125.182701
© 2020 American Physical Society