DWBA analysis of the 13C(6Li,d)17O reaction at 10 MeV/nucleon and its astrophysical implications

Details DWBA analysis of the 13C(6Li,d)17O reaction at 10 MeV/nucleon and its astrophysical implications DWBA analysis of the 13C(6Li,d)17O reaction at 10 MeV/nucleon and its astrophysical implications

2003-06-17

arxiv.org/abs/nucl-th/0306048v2

Nucl.Phys. A726 (2003) 159-172

Physics

Nuclear Physics

Nuclear Theory

17 pages, 4 figures, minor changes, accepted by Nuclear Physics A

Scientific paper

10.1016/S0375-9474(03)01622-1

The value of the alpha spectroscopic factor (S_alpha) of the 6.356 MeV 1/2+ state of 17O is believed to have significant astrophysical implications due to the importance of the 13C(alpha,n)16O reaction as a possible source of neutron production for the s process. To further study this effect, an accurate measurement of the 13C(6Li,d)17O reaction at E_lab = 60 MeV has been performed recently by Kubono et al., who found a new value for the spectroscopic factor of the 6.356 MeV 1/2+ state of 17O based on a distorted wave Born approximation (DWBA) analysis of these data. This new value, S_alpha approximately = 0.011, is surprisingly much smaller than those used previously in astrophysical calculations (S_alpha approximately = 0.3-0.7) and thus poses a serious question as to the role of the 13C(alpha,n)16O reaction as a source of neutron production. In this work we perform a detailed analysis of the same 13C(6Li,d)17O data within the DWBA as well as the coupled reaction channel (CRC) formalism. Our analysis yields an S_alpha value of over an order of magnitude larger than that of Kubono et al. for the 6.356 MeV 1/2+ state of 17O.

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