Investigating neutron transfer in the Be 9 + Au 197 system

Abstract

In this work n-transfer and incomplete fusion cross sections for the 9 Be + 197Au system are reported over a wide energy range, Ec.m. ≈ 29-45 MeV. The experiment was carried out using the activation technique and off-line γ counting. The transfer process is found to be the dominant mode as compared to all other reaction channels. Detailed coupled reaction channel (CRC) calculations have been performed for n-transfer stripping and pickup cross sections. The measured 1n-stripping cross sections are explained with CRC calculations by including the ground state and the 2+ resonance state (E = 3.03 MeV) of 8 Be. The calculations for 1n-pickup cross sections, including only the ground state of 10Be agrees reasonably well with the measured cross sections, while it overpredicts the data at subbarrier energies. For better insight into the role of the projectile structure in the transfer process, a comprehensive analysis of the 1n-stripping reaction has been carried out for various weakly bound projectiles on a 197Au target nucleus. The transfer cross sections scaled with the square of the total radius of interacting nuclei show the expected Q-value dependence of the 1n-stripping channel for weakly bound stable projectiles