首页|The controversy 3/2(+) state in Be-7 and its effect on the He-3(alpha, gamma )Be-7 reaction
The controversy 3/2(+) state in Be-7 and its effect on the He-3(alpha, gamma )Be-7 reaction
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NSTL
Elsevier
The He-3(alpha, gamma )Be-7 reaction is important for the solar hydrogen burning and the Big Bang Nucleosynthesis. The cross sections at astrophysical energies have not yet been precisely determined, the extrapolation has to rely on the full excitation spectrum of Be-7. A controversy 3/2(+) resonance state firstly reported in the study of the Li-6(p, gamma )Be-7 reaction has attracted many attentions in the recent years. In this work, both reactions of He-3(alpha, gamma )Be-7 and Li-6(p, gamma )Be-7 are reanalyzed together in the formalism of R-matrix with and without the 3/2(+) state in Be-7. The results show that this nonnormal state cannot be ruled out based on existing data. According to the present analysis, the 3/2(+) resonance does not have a significant impact on the He-3(alpha, gamma )Be-7 reaction at astrophysical energies, but the accurate measurement of the cross sections of He-3(alpha, gamma )Be-7 at E-cm > 4 MeV can be used as a verification for the existence of the state. (C) 2022 Published by Elsevier B.V.
Radiative captureBig Bang nucleosynthesisStellar hydrogen burningResonance reactions
NSTL
Elsevier
