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Effects of Isospin Equilibrium on Cold Fusion of Superheavy Nuclei |
| LIU Zu-Hua1,3;BAO Jing-Dong1,2 |
| 1Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
2Department of Physics, Beijing Normal University, Beijing 100875
3China Institute of Atomic Energy, Beijing 102413 |
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| Cite this article: |
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LIU Zu-Hua, BAO Jing-Dong 2005 Chin. Phys. Lett. 22 3044-3047 |
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Abstract The neutron flow model predicts that neutrons start to flow freely between the approaching nuclei 58Fe and 208Pb at s=3fm, a length in which the effective surfaces of these nuclei are 3fm apart. As a result of neutron flow, the N/Z value rapidly reaches an equilibrium distribution. Meanwhile the system, originally in the fusion valley, is injected into the asymmetric fission valley. The dynamic process of the composite nucleus in the asymmetric fission valley is treated with a two-parameter Smoluchowski equation. It is shown that the probability to overcome the asymmetric fission barrier and to achieve compound nucleus configuration, hence the fusion cross section is obviously suppressed due to the effect of isospin equilibrium.
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| Keywords:
25.70.Jj
25.70.Gh
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Published: 01 December 2005
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| PACS: |
25.70.Jj
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(Fusion and fusion-fission reactions)
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25.70.Gh
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(Compound nucleus)
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