Roles of Isospin in Evaporation Residue Cross Section as a Probe of Nuclear Dissipation

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2008,（3）
• 页码范围: 739-742
• 页数: 4页
• 语种: 英文

摘要

The influence of isospin on the excess of evaporation residue cross section over its standard statistical-model value for nuclei 194Pb, 200pb, and 206pb is studied via a Langevin equation coupled with a statistical decay model. The magnitude of this excess for a low-isospin fissioning nucleus is shown to be larger and its dependence on the nuclear viscosity coefficient to be stronger than those of a high-isospin fissioning nucleus. These results suggest that to obtain a more accurate information of viscosity coefficient inside the saddle point by measuring evaporation residue cross sections, we had better choose those compound systems with small isospin.