Proton and neutron exchange as a prelude to fusion at near-barrier energies

• Published in: Physical review. C 2022-07, Vol.106 (1), Article L011603
• Main Authors: Johnstone, J. E., Singh, Varinderjit, Giri, R., Hudan, S., Vadas, J., deSouza, R. T., Ackermann, D., Chbihi, A., Hourdille, Q., Abbott, A., Balhoff, C., Hannaman, A., McIntosh, A. B., Sorensen, M., Tobin, Z., Wakhle, A., Yennello, S. J., Famiano, M. A., Brown, K. W., Santamaria, C., Lubian, J., Soler, H. O., Carlson, B. V.
• Format: Article
• Language: English
• Subjects: heavy-ion reactions; near barrier fusion; neutron-rich fusion; NUCLEAR PHYSICS AND RADIATION PHYSICS; radioactive ion beams
• ISSN: 2469-9985; 2469-9993
• DOI: 10.1103/PhysRevC.106.L011603

Systematic examination of fusion for 39,41,45,47K + 28Si and 36,44Ar + 28Si provides insight into the impact of neutron and proton exchange on fusion for nuclei at and near the N = 20 and N = 28 shells. Comparison of the reduced excitation functions reveals a marked difference between the behavior of open-shell and closed-shell systems. While coupled channels calculations provide a good description for the closed-shell nuclei, they significantly underpredict the fusion cross section for open-shell nuclei. Furthermore, the observed trends are examined in the context of a potential energy surface, including shell effects, and multinucleon exchange with consideration of Pauli blocking.