Study on Dynamic Fusion Barrier in Heavy-Ion Fusion Reactions

TIAN Jun-Long; WU Xi-Zhen; LI Zhu-Xia

Chinese Physics C> 2006, Vol. 30> Issue(5) : 428-434

Study on Dynamic Fusion Barrier in Heavy-Ion Fusion Reactions

China Institute of Atomic Energy, Beijing 102413, China2 Institute of Modern Physics, Shanxi Teachers University, Linfen 041004, China3 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China4 Institute of Theoretical Physics, Chinese Academic of Science, Beijing 100080, China

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Abstract：
By means of the improved quantum molecular dynamics model, the incident energy dependent dynamical fusion potential barriers for heavy nucleus reaction systems are investigated. It is found that with decrease of incident energy the lowest dynamic barrier is obtained which approaches to the adiabatic static barrier and with increase of the incident energy the dynamic barrier goes up to the diabatic static barrier. Based on the dynamical study a microscopic understanding of the extra-push in fusion reactions of heavy systems and a new explanation of tunneling process for the fusion at the incident energy below the static and above the lowest dynamic barrier are presented. In order to understand the energy dependence of the dynamical barrier we also pay a great attention to study the neck formation and shape deformation during the dynamic lowering of the barrier.

References

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TIAN Jun-Long, WU Xi-Zhen and LI Zhu-Xia. Study on Dynamic Fusion Barrier in Heavy-Ion Fusion Reactions[J]. Chinese Physics C, 2006, 30(5): 428-434.

TIAN Jun-Long, WU Xi-Zhen and LI Zhu-Xia. Study on Dynamic Fusion Barrier in Heavy-Ion Fusion Reactions[J]. Chinese Physics C, 2006, 30(5): 428-434. shu

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Received: 2005-07-30
Revised: 1900-01-01

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Study on Dynamic Fusion Barrier in Heavy-Ion Fusion Reactions

Corresponding author: TIAN Jun-Long,

China Institute of Atomic Energy, Beijing 102413, China2 Institute of Modern Physics, Shanxi Teachers University, Linfen 041004, China3 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China4 Institute of Theoretical Physics, Chinese Academic of Science, Beijing 100080, China

Received Date: 2005-07-30
Accepted Date: 1900-01-01
Available Online: 2006-05-05

Abstract: By means of the improved quantum molecular dynamics model, the incident energy dependent dynamical fusion potential barriers for heavy nucleus reaction systems are investigated. It is found that with decrease of incident energy the lowest dynamic barrier is obtained which approaches to the adiabatic static barrier and with increase of the incident energy the dynamic barrier goes up to the diabatic static barrier. Based on the dynamical study a microscopic understanding of the extra-push in fusion reactions of heavy systems and a new explanation of tunneling process for the fusion at the incident energy below the static and above the lowest dynamic barrier are presented. In order to understand the energy dependence of the dynamical barrier we also pay a great attention to study the neck formation and shape deformation during the dynamic lowering of the barrier.