Study of the ^7Be(d,^3He)^6Li* reaction at 5 MeV/u
arxiv(2024)
摘要
The measurement of the ^7Be(d,^3He)^6Li* transfer cross section at 5
MeV/u is carried out. The population of the 2.186 MeV excited state of ^6Li
in this reaction channel is observed for the first time. The experimental
angular distributions have been analyzed in the finite range DWBA and
coupled-channel frameworks. The effect of the ^7Be(d,^3He)^6Li reaction
on both the ^6Li and ^7Li abundances are investigated at the relevant
big-bang nucleosynthesis energies. The excitation function is calculated by
TALYS and normalized to the experimental data. The S factor of the
(d,^3He) channel from the present work is about 50% lower than existing
data at nearby energies. At big-bang energies, the S factor is about three
orders of magnitude smaller than that of the (d,p) channel. The (d,^3He)
reaction rate is found to have a less than 0.1% effect on the ^6,7Li
abundances.
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