Fusion cross sections at deep sub-barrier energies

被引:94
作者
Hagino, K [1 ]
Rowley, N
Dasgupta, M
机构
[1] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan
[2] Univ Paris 11, Inst Phys Nucl, CNRS, IN2P3, F-91406 Orsay, France
[3] Univ Strasbourg, Inst Rech Subatom, UMR7500, CNRS,IN2P3, F-67037 Strasbourg 2, France
[4] Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Nucl Phys, Canberra, ACT 0200, Australia
来源
PHYSICAL REVIEW C | 2003年 / 67卷 / 05期
关键词
D O I
10.1103/PhysRevC.67.054603
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
A recent publication reports that heavy-ion fusion cross sections at extreme sub-barrier energies show a continuous change of their logarithmic slope with decreasing energy, resulting in a much steeper excitation function compared with theoretical predictions. We show that the energy dependence of this slope is partly due to the asymmetric shape of the Coulomb barrier; that is, its deviation from a harmonic shape. We also point out that the large low-energy slope is consistent with the surprisingly large surface diffusenesses required to fit recent high-precision fusion data.
引用
收藏
页码:546031 / 546034
页数:4
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