Li astrophysical S factors from the no-core shell model with continuum

Abstract : The 3He(α,γα,γ)7Be and 3H(α,γα,γ)7Li astrophysical S factors are calculated within the no-core shell model with continuum using a renormalized chiral nucleon–nucleon interaction. The 3He(α,γα,γ)7Be astrophysical S factors agree reasonably well with the experimental data while the 3H(α,γα,γ)7Li ones are overestimated. The seven-nucleon bound and resonance states and the α + 3He/3H elastic scattering are also studied and compared with experiment. The low-lying resonance properties are rather well reproduced by our approach. At low energies, the s-wave phase shift, which is non-resonant, is overestimated.
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J. Dohet-Eraly, P. Navrátil, S. Quaglioni, W. Horiuchi, G. Hupin, et al.. Li astrophysical S factors from the no-core shell model with continuum. Physics Letters B, Elsevier, 2016, 757, pp.430-436. ⟨10.1016/j.physletb.2016.04.021⟩. ⟨in2p3-01334698⟩

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