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

✍ Scribed by N. Keeley; K.W. Kemper; Dao T. Khoa

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 183 KB
• Volume: 726
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(03)01622-1

✦ Synopsis

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