Radiative alpha-capture rates leading to A - 7 nuclei - Applications to the solar neutrino problem and Big Bang nucleosynthesis

Recent resonating group calculations provide a good description of the cross sections for the radiative capture reactions <SUP>3</SUP>He(α, γ)<SUP>7</SUP>Be and H(α,γ)<SUP>7</SUP>Li. We have reviewed the available experimental data for these reactions and extrapolated them to zero energy by normalizing to the resonating group results in a consistent way; recommended reaction rates as a function of temperature are obtained. From these (α, γ) rates and a survey of other nuclear reactions that influence the production of solar neutrinos, we conclude that remaining uncertainties in the nuclear reaction rates are not a likely explanation of the low observed detection rate in the <SUP>37</SUP>Cl solar neutrino detector. We also find that the reaction rates are sufficiently accurate to predict big bang production of <SUP>7</SUP>Li within ±35% at all relevant densities and to obtain both upper and lower bounds on the universal mass density from the observed <SUP>7</SUP>Li abundance.

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