Fusion Barriers in Heavy Ion Collisions

ZHU Long; SU Jun; XIE Wenjie; GUO Chenchen; ZHANG Donghong; ZHANG Fengshou

doi:10.11804/NuclPhysRev.31.03.350

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Article Navigation > Nuclear Physics Review > 2014 > 31(3): 350-358

ZHU Long, SU Jun, XIE Wenjie, GUO Chenchen, ZHANG Donghong, ZHANG Fengshou. Fusion Barriers in Heavy Ion Collisions[J]. Nuclear Physics Review, 2014, 31(3): 350-358. doi: 10.11804/NuclPhysRev.31.03.350

Citation:

ZHU Long, SU Jun, XIE Wenjie, GUO Chenchen, ZHANG Donghong, ZHANG Fengshou. Fusion Barriers in Heavy Ion Collisions[J]. Nuclear Physics Review, 2014, 31(3): 350-358. doi: 10.11804/NuclPhysRev.31.03.350

Fusion Barriers in Heavy Ion Collisions

doi: 10.11804/NuclPhysRev.31.03.350

Key Laboratory of Beam Technology and Material Modi cation of Ministry of Education,College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
Beijing Radiation Center, Beijing 100875, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2014-09-20

Abstract

Study of fusion barrier is very important for people to better understand fusion reactions. In this paper the Improved Isospin-dependent Quantum Molecular Dynamics(ImIQMD) model is introduced firstly.Then the shell correction effects, energy dependence, isospin effects and orientation effects of fusion barrier are studied. The fusion barriers for the fusion reactions ⁴⁰Ca+⁴⁰Ca, ⁴⁸Ca+²⁰⁸Pb, ⁴⁸Ca+²⁰⁴Pb and ¹⁶O+¹⁵⁴Sm are extracted. The negative shell correction energies lower potential barriers of a certain reaction. A complex phenomenon of energy dependence is observed. It is also found that incident energy dependence of the barrier radius and barrier height shows opposite behaviors. The Coulomb potential shows weak energy dependence when distance of two colliding nuclei is lower than the touching distance. The isospin effects of the potential barrier are investigated. The orientation effects of the potential barrier are also discussed for the system ¹⁶O+¹⁵⁴Sm.
- potential barrier,
- shell correction,
- isospin effect,
- incident energy dependence,
- orientation effect,
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Fusion Barriers in Heavy Ion Collisions

doi: 10.11804/NuclPhysRev.31.03.350

Key Laboratory of Beam Technology and Material Modi cation of Ministry of Education,College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;

Beijing Radiation Center, Beijing 100875, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2014-09-20

Key words:

Abstract: Study of fusion barrier is very important for people to better understand fusion reactions. In this paper the Improved Isospin-dependent Quantum Molecular Dynamics(ImIQMD) model is introduced firstly.Then the shell correction effects, energy dependence, isospin effects and orientation effects of fusion barrier are studied. The fusion barriers for the fusion reactions ⁴⁰Ca+⁴⁰Ca, ⁴⁸Ca+²⁰⁸Pb, ⁴⁸Ca+²⁰⁴Pb and ¹⁶O+¹⁵⁴Sm are extracted. The negative shell correction energies lower potential barriers of a certain reaction. A complex phenomenon of energy dependence is observed. It is also found that incident energy dependence of the barrier radius and barrier height shows opposite behaviors. The Coulomb potential shows weak energy dependence when distance of two colliding nuclei is lower than the touching distance. The isospin effects of the potential barrier are investigated. The orientation effects of the potential barrier are also discussed for the system ¹⁶O+¹⁵⁴Sm.