Abstract
The is an important reaction in stellar helium burning environments as it competes directly with one of the main neutron sources for the s-process, the reaction. The reaction rate of the is dominated by the low-energy resonances at and 830 keV, respectively. The -keV resonance has been measured previously, but there are some uncertainties in the previous measurements. We confirmed the measurement of the -keV resonance using implanted targets. We obtained a resonance strength of and provide a weighted average of the present and previous measurements of with reduced uncertainties compared to previous studies. We also attempted to measure the strength of the predicted resonance at keV directly for the first time and found an upper limit of for the strength of this resonance. In addition, we also studied the -keV resonance in and obtained a resonance strength of eV with significantly lower uncertainties compared to previous measurements.
- Received 10 May 2022
- Revised 8 July 2022
- Accepted 12 August 2022
DOI:https://doi.org/10.1103/PhysRevC.106.025805
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