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

A. Richard; C. Beck; H.Q. Zhang; C.J. Lin; F. Yang; H.M. Jia; X.X. Xu; Z.D. Wu; F. Jia; S.T. Zhang; Z.H. Liu

doi:doi:10.1051/epjconf/20111708005

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

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

A. Richard¹, C. Beck¹^a, H.Q. Zhang², C.J. Lin², F. Yang², H.M. Jia², X.X. Xu², Z.D. Wu², F. Jia², S.T. Zhang² and Z.H. Liu²

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

Published online: 19 October 2011

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.