Investigation of the one-neutron transfer in 13C+28Si at Elab=30 and 34 MeV

Background: Neutron transfer measurements for the O-18+ Si-28 system have shown that the experimental one-neutron and two-neutron transfer cross sections are well reproduced with spectroscopic amplitudes from two different shell-model interactions for the Si isotopes: psdmod for the two-neutron transfer, and psdmwkpn for the one-neutron transfer. Purpose: The need for two distinct shell-model interactions to reproduce two neutron-transfer processes in the same nuclei may cover a more complex mechanism in the one-neutron transfer that requires the unpairing of neutrons prior to its transfer in the (O-18, O-17) reaction. Studying a nucleus where this characteristic is absent (C-13) should help to elucidate this question. Method: One-neutron transfer cross sections were measured for the C-13+ Si-28 at E-lab = 30 and 34 MeV, and compared with coupled reaction channel calculations using spectroscopic amplitudes derived from the psdmod and psdmwkpn shell-model interactions. Results: The spectroscopic amplitudes from the psdmod interaction for the relevant states in Si-29 provide a good description of the experimental data and the corresponding values agree with previous estimates obtained from the (d, p) reaction. Conclusions: The experimental data for the one-neutron transfer to Si-28 induced by (C-13, C-12) reaction is well reproduced using spectroscopic amplitudes from the psdmod.