Evaluation of Modern 3He(alpha,gamma)7Be Data
Richard H. Cyburt, Barry Davids
TL;DR
This paper analyzes recent precise experimental data on the 3He(alpha,gamma)7Be reaction, crucial for understanding primordial element formation and solar neutrino production, providing a refined reaction rate estimate.
Contribution
It introduces a robust, minimally model-dependent method to analyze discrepant experimental data for the 3He(alpha,gamma)7Be reaction.
Findings
Determined S34(0)=0.580 pm 0.043 keV b at 68.3% confidence level
Provided a comprehensive analysis of modern experimental data
Improved the reaction rate estimate for astrophysical models
Abstract
In both the Sun and the early universe, the 3He(alpha,gamma)7Be reaction plays a key role. The rate of this reaction is the least certain nuclear input needed to calculate both the primordial 7Li abundance in big bang nucleosynthesis (BBN) and the solar neutrino flux. Taking advantage of several recent highly precise experiments, we analyse modern 3He(alpha,gamma)7Be data using a robust and minimally model dependent approach capable of handling discrepant data sets dominated by systematic rather than statistical errors. We find S34(0)=0.580 pm 0.043(0.054) keV b at the 68.3(95.4)% confidence level.
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