Isotope Dependence of Superheavy Nucleus Formation Cross Section  

作　　者：刘祖华 包景东 

机构地区：[1]China Institute of Atomic Energy, Beijing 102413 [2]Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875 [3]Department of Physics, Beijing Normal University, Beijing 100875

出　　处：《Chinese Physics Letters》2006年第6期1437-1440,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grants Nos 10235020 and 10235030, and the Major State Basic Research and Development Programme of China under Grant No G200007400.

摘　　要：The dynamical process in the superheavy nucleus synthesis is studied on the basis of the two-dimensional Smoluchowski equation. Special attention is paid to the isotope dependence of the cross section for the superheavy nucleus formation by means of making a comparison among the reaction systems of ^54Re＋204pb, ^56Re ＋206Pb, and ^58Fe＋^208Pb. It is found by this comparison that the formation cross section is very sensitive to the conditional saddle-point height and the neutron separation energy of the compound nucleus. Reaction systems with lower height of conditional saddle-point and smaller neutron separation energy are more favourable for the synthesis of the superheavy nucleus.The dynamical process in the superheavy nucleus synthesis is studied on the basis of the two-dimensional Smoluchowski equation. Special attention is paid to the isotope dependence of the cross section for the superheavy nucleus formation by means of making a comparison among the reaction systems of ^54Re＋204pb, ^56Re ＋206Pb, and ^58Fe＋^208Pb. It is found by this comparison that the formation cross section is very sensitive to the conditional saddle-point height and the neutron separation energy of the compound nucleus. Reaction systems with lower height of conditional saddle-point and smaller neutron separation energy are more favourable for the synthesis of the superheavy nucleus.

关 键 词：COMPOUND NUCLEUS HEAVIEST NUCLEI COLD-FUSION ELEMENTS HEAVY MECHANISM ENERGIES BARRIER CHANNEL MODEL 

分 类 号：O571[理学—粒子物理与原子核物理]