TY - JOUR
T1 - The Li8(d,p)Li9 reaction and the astrophysical Li8(n,γ)Li9 reaction rate
AU - Li, Z. H.
AU - Liu, W. P.
AU - Bai, X. X.
AU - Guo, B.
AU - Lian, G.
AU - Yan, S. Q.
AU - Wang, B. X.
AU - Zeng, S.
AU - Lu, Y.
AU - Su, J.
AU - Chen, Y. S.
AU - Wu, K. S.
AU - Shu, N. C.
AU - Kajino, T.
PY - 2005/5
Y1 - 2005/5
N2 - The Li8(n,γ)Li9 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 Li8(d,p)Li9 reaction, indirectly. We have measured the angular distribution of the Li8(d,p)Li9g.s. reaction at Ec.m. = 7.8 in inverse kinematics using coincidence detection of Li9 and the recoil proton, for the first time. Based on distorted wave Born approximation (DWBA) analysis, the Li8(d,p)Li9g.s. cross section was determined to be 7.9 ± 2.0 mb. The single particle spectroscopic factor S1,3/2 for the ground state of Li9=Li8 n was derived to be 0.68±0.14, and then used to calculate the direct capture cross sections for the Li8(n,γ)Li9g.s. reaction at energies of astrophysical interest. The astrophysical Li8(n,γ)Li9g.s. reaction rate for the direct capture was found to be 3970±950cm3mole-1s-1 at T9=1. This presents the first experimental constraint for the Li8(n,γ)Li9 reaction rates of astrophysical relevance.
AB - The Li8(n,γ)Li9 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 Li8(d,p)Li9 reaction, indirectly. We have measured the angular distribution of the Li8(d,p)Li9g.s. reaction at Ec.m. = 7.8 in inverse kinematics using coincidence detection of Li9 and the recoil proton, for the first time. Based on distorted wave Born approximation (DWBA) analysis, the Li8(d,p)Li9g.s. cross section was determined to be 7.9 ± 2.0 mb. The single particle spectroscopic factor S1,3/2 for the ground state of Li9=Li8 n was derived to be 0.68±0.14, and then used to calculate the direct capture cross sections for the Li8(n,γ)Li9g.s. reaction at energies of astrophysical interest. The astrophysical Li8(n,γ)Li9g.s. reaction rate for the direct capture was found to be 3970±950cm3mole-1s-1 at T9=1. This presents the first experimental constraint for the Li8(n,γ)Li9 reaction rates of astrophysical relevance.
UR - https://www.scopus.com/pages/publications/27144497339
U2 - 10.1103/PhysRevC.71.052801
DO - 10.1103/PhysRevC.71.052801
M3 - 文章
AN - SCOPUS:27144497339
SN - 0556-2813
VL - 71
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
IS - 5
M1 - 052801
ER -