Chinese Physics C > 2001, Vol. 25 > Issue(5): 399-404

Study of Fusion Mechanism of Halo Nuclear¹¹Be+²⁰⁸Pb by Applying QMD Model

WANG Ning^,,
LI Zhu-Xia

China Institute of Atomic Energy, Beijing 102413, China2 Physics Department, Northwest University, Xi'an 710069, China3 Center of Nuclear Theory, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China4 Institute of Theoretical Physics, CAS, Beijing 100080, China

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Abstract：
We have studied the fusion reaction for ¹¹Be+ ²⁰⁸Pb near barrier by applying QMD model, and find taht in the fusion reaction induced by halo nuclei there simultaneously exist two mechanisms competing with each other. On one hand, ¹¹Be is a weakly bound nuclear system and is easily broke up caused by the interaction with target, when it approaches to target, so the fusion cross section is suppressed. On the other and, several neutrons of ¹¹Be transfer into ²⁰⁸Pb and interact with ²⁰⁸Pb to cause the local radius of ²⁰⁸Pb increase and result in an enhancement of fusion cross section. The fusion cross sections calculatd show an enhancement near barrier, and the calculated results agree with the experimental data reasonably well.

References

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Takigawa N,Sagawa H. Phys Lett.,1991,B265:23 2 Takigawa N,Sagawa H. Nucl.Phys.,1992,A538:221c 3 Hussein M S et al. Phys. Rev.,1992 C46:377 4 Hussein M S et al. Nucl. Phys.,1995 A592:27 5 HartnackCetal.Nucl.Phys.,1989 A495:303 6 Toshiki Maruyama et al.Phys. Rev. C, V42:386 7 Hamamoto I, Sagawa H, Zhang X Z. Nucl. Phys.,1999, A648:203

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WANG Ning and LI Zhu-Xia. Study of Fusion Mechanism of Halo Nuclear ¹¹Be+ ²⁰⁸Pb by Applying QMD Model[J]. Chinese Physics C, 2001, 25(5): 399-404.

WANG Ning and LI Zhu-Xia. Study of Fusion Mechanism of Halo Nuclear ¹¹Be+ ²⁰⁸Pb by Applying QMD Model[J]. Chinese Physics C, 2001, 25(5): 399-404. shu

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Received: 2000-03-20
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of Fusion Mechanism of Halo Nuclear¹¹Be+²⁰⁸Pb by Applying QMD Model

WANG Ning^,
LI Zhu-Xia

Corresponding author:WANG Ning,

China Institute of Atomic Energy, Beijing 102413, China2 Physics Department, Northwest University, Xi'an 710069, China3 Center of Nuclear Theory, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China4 Institute of Theoretical Physics, CAS, Beijing 100080, China

Received Date:2000-03-20
Accepted Date:1900-01-01
Available Online:2001-05-05

Abstract:We have studied the fusion reaction for¹¹Be+²⁰⁸Pb near barrier by applying QMD model, and find taht in the fusion reaction induced by halo nuclei there simultaneously exist two mechanisms competing with each other. On one hand,¹¹Be is a weakly bound nuclear system and is easily broke up caused by the interaction with target, when it approaches to target, so the fusion cross section is suppressed. On the other and, several neutrons of¹¹Be transfer into²⁰⁸Pb and interact with²⁰⁸Pb to cause the local radius of²⁰⁸Pb increase and result in an enhancement of fusion cross section. The fusion cross sections calculatd show an enhancement near barrier, and the calculated results agree with the experimental data reasonably well.