| Isotope Dependence of Superheavy Nucleus Formation Cross Section |
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| 作者姓名： | 刘祖华 包景东 |
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| 作者单位： | [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 |
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| 基金项目： | 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. |
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| 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.
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| 关 键 词： | 同位素 超重元素 核子群交叉断面 动力学过程 |
| 收稿时间： | 2005-12-01 |
| 修稿时间： | 2005-12-01 |
Isotope Dependence of Superheavy Nucleus Formation Cross Section |
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| LIU Zu-Hua,BAO Jing-Dong.Isotope Dependence of Superheavy Nucleus Formation Cross Section[J].Chinese Physics Letters,2006,23(6):1437-1440. |
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| Authors: | LIU Zu-Hua BAO Jing-Dong |
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| Institution: | China Institute of Atomic Energy, Beijing 102413
Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
Department of Physics, Beijing Normal University, Beijing 100875 |
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| Abstract: | 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 54Fe + 204Pb, 56Fe + 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. |
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| Keywords: | 25 70 Jj 25 70 Gh |
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