Abstract
A possible mechanism to explain the origin of the light nuclei in the Galaxy is the nucleosynthesis in the proton-rich neutrino-driven wind ejecta of core-collapse supernovas via the process. However, this production scenario is very sensitive to the underlying supernova dynamics and the nuclear physics input. As far as the nuclear uncertainties are concerned, the breakout from the chains via the reaction has been identified as an important link which can influence the nuclear flow and, therefore, the efficiency of the process. However, its reaction rate is poorly known over the relevant temperature range, = 1.5–3 GK. We report on the first direct measurement of two resonances of the reaction with previously unknown strengths using an intense radioactive beam from the Isotope Separator and Accelerator (ISAC-I) Center facility and the DRAGON recoil separator in inverse kinematics. We have decreased the reaction rate uncertainty to % over the relevant temperature region.
5 More- Received 31 December 2021
- Revised 1 July 2022
- Accepted 12 September 2022
DOI:https://doi.org/10.1103/PhysRevC.106.045805
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