American Physical Society, Physical Review C, 5(71), 2005
DOI: 10.1103/physrevc.71.052801
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The â¸Li(n,γ)â¹Li reaction plays an important role in both the r-process nucleosynthesis and the inhomogeneous big bang models. Its direct capture rates can be extracted from the â¸Li(d,p)â¹Li reaction, indirectly. We have measured the angular distribution of the â¸Li(d,p)â¹Li{sub g.s.} reaction at E{sub c.m.} = 7.8 in inverse kinematics using coincidence detection of â¹Li and the recoil proton, for the first time. Based on distorted wave Born approximation (DWBA) analysis, the â¸Li(d,p)â¹Li{sub g.s.} cross section was determined to be 7.9 {+-} 2.0 mb. The single particle spectroscopic factor S{sub 1,3/2} for the ground state of â¹Li=â¸Lixn was derived to be 0.68{+-}0.14, and then used to calculate the direct capture cross sections for the â¸Li(n,γ)â¹Li{sub g.s.} reaction at energies of astrophysical interest. The astrophysical â¸Li(n,γ)â¹Li{sub g.s.} reaction rate for the direct capture was found to be 3970{+-}950 cm³ moleâ»Â¹ sâ»Â¹ at Tâ=1. This presents the first experimental constraint for the â¸Li(n,γ)â¹Li reaction rates of astrophysical relevance.