Fusion and Heavy Ion Reactions

概要

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The purpose of this report is to review some simple aspects of heavy ion interactions which may be useful for understanding of sub-barrier fusion processes. The Christensen-Winther (CW) is a typical potential and is a useful starting point for a nucleus-nucleus interaction. It gives good values for the height and radius of the Coulomb barrier for many heavy ion pairs. With this and other similar interactions there is a rather large separation between the top of the Coulomb barrier and the point at which the densities come into contact. When used in conjunction with the coupled channels method potentials like the CW interaction give good fusion cross-sections near and for a few MeV below the top of the barrier. The coupled channels method fails in some cases when the energy is of the order of 5 Mev below the barrier. There is evidence that increasing the surface diffuseness of the ion-ion potential might help to resolve this problem. Cluster radioactivity is an inverse process to sub-barrier fusion, but the energies below the top of the Coulomb barrier are very different.
理論物理学刊行会の論文
2004-07-30