Abstract
Alpha radiative capture reactions offers the opportunity to study nuclear processes of astrophysical interest. Most of the existing data on these processes have been gained by means of gamma-ray spectroscopy, where the measurements are very difficult due to the low cross sections and the relatively high background in the detectors. We have calculated the two-alpha radiative capture process and excitations of 8Be nuclei interacting using current conservation realistic two- and three-nucleon potentials, at settler energies. We have presented the results of Faddeev-type calculations for current conservation of two- and three-body interactions to cluster nuclear reactions. Our results for cross sections are found to be 128 (140) nanobarn for the current conservation two-body (two-body and three-body) interactions, at the resonance energy with an 14 % (6 %) accuracy in comparison with the recent experimental data, respectively. The results for B (E2) value of 8Be is also found to be 21.7 (20.8) e 2 fm 4, in comparison with the very recent experimental data with an error of 7 % (2 %). Our calculation show that the bulk energies are corrected by improved few-body potentials.
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