학술논문
Proton and neutron exchange as a prelude to fusion at near-barrier energies
Document Type
Working Paper
Author
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.
Source
Subject
Language
Abstract
Systematic examination of fusion for $^{39,41,45,47}$K + $^{28}$Si and $^{36,44}$Ar + $^{28}$Si 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 under-predict the fusion cross-section for open-shell nuclei. The observed trends are examined in the context of a potential energy surface, including shell effects, and multi-nucleon exchange with consideration of Pauli-blocking.
Comment: 7 pages, 4 figures
Comment: 7 pages, 4 figures