EPJ Web of Conferences 17, 08005 (2011)
https://doi.org/10.1051/epjconf/20111708005

Multi-neutron transfer coupling in sub-barrier ³²S + ^90,96Zr fusion reactions

¹ Institut Pluridisciplinaire Hubert Curien, UMR 7178, CNRS-IN2P3 and Université de Strasbourg, B.P. 28, F-67037 Strasbourg Cedex 2, France
² China Institute of Atomic Energy (CIAE), 102413 Beijing, China

^a e-mail: christian.beck@iphc.cnrs.fr

Abstract

The role of neutron transfers is investigated in the fusion process below the Coulomb barrier by analyzing ³²S+⁹⁰Zr and ³²S+⁹⁶Zr as benchmark reactions. A full coupled-channel calculation of the fusion excitation functions has been performed for both systems by using multi-neutron transfer coupling for the more neutronrich reaction. The enhancement of fusion cross sections for ³²S+⁹⁶Zr is well reproduced at sub-barrier energies by NTFus code calculations including the coupling of the neutron-transfer channels following the Zagrebaev semiclassical model. We found similar effects for ⁴⁰Ca+⁹⁰Zr and ⁴⁰Ca+⁹⁶Zr fusion excitation functions.