中国物理B ›› 2009, Vol. 18 ›› Issue (1): 136-141.doi: 10.1088/1674-1056/18/1/021

• NUCLEAR PHYSICS • 上一篇    下一篇

Nucleon--nucleon interactions in the double folding model for fusion reactions

张高龙1, 乐小云1, 刘浩2   

  1. (1)Department of Physics, School of Science, Beijing University of Aeronautics and Astronautics, Beijing 100083, China; (2)Physics Laboratory, Lanzhou Commercial College, Lanzhou 730020, China
  • 收稿日期:2008-04-19 修回日期:2008-08-27 出版日期:2009-01-20 发布日期:2009-01-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60572177).

Nucleon--nucleon interactions in the double folding model for fusion reactions

Zhang Gao-Long(张高龙)a)†, Liu Hao(刘浩)b), and Le Xiao-Yun(乐小云)a)   

  1. a Department of Physics, School of Science, Beijing University of Aeronautics and Astronautics, Beijing 100083, China; b Physics Laboratory, Lanzhou Commercial College, Lanzhou 730020, China
  • Received:2008-04-19 Revised:2008-08-27 Online:2009-01-20 Published:2009-01-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60572177).

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摘要： Nucleus--nucleus potentials are determined in the framework of double folding model for M3Y--Reid and M3Y--Paris effective nucleon--nucleon (NN) interactions. Both zero-range and finite-range exchange parts of NN interactions are considered in the folding procedure. In this paper the spherical projectile--spherical target system 16O+208Pb is selected for calculating the barrier energies, fusion cross sections and barrier distributions with the density-independent and density-dependent NN interactions on the basis of M3Y--Reid and M3Y--Paris NN interactions. The barrier energies become lower for Paris NN interactions in comparison with Reid NN interactions, and also for finite-range exchange part in comparison with zero-range exchange part. The density-dependent NN interactions give similar fusion cross sections and barrier distributions, and the density-independent NN interaction causes the barrier distribution moving to a higher position. However, the density-independent Reid NN interaction with zero-range exchange part gives the lowest fusion cross sections. We find that the calculated fusion cross sections and the barrier distributions are in agreement with the experimental data after renormalization of the nuclear potential due to coupled-channel effect.

Abstract: Nucleus--nucleus potentials are determined in the framework of double folding model for M3Y--Reid and M3Y--Paris effective nucleon--nucleon (NN) interactions. Both zero-range and finite-range exchange parts of NN interactions are considered in the folding procedure. In this paper the spherical projectile--spherical target system 16O+208Pb is selected for calculating the barrier energies, fusion cross sections and barrier distributions with the density-independent and density-dependent NN interactions on the basis of M3Y--Reid and M3Y--Paris NN interactions. The barrier energies become lower for Paris NN interactions in comparison with Reid NN interactions, and also for finite-range exchange part in comparison with zero-range exchange part. The density-dependent NN interactions give similar fusion cross sections and barrier distributions, and the density-independent NN interaction causes the barrier distribution moving to a higher position. However, the density-independent Reid NN interaction with zero-range exchange part gives the lowest fusion cross sections. We find that the calculated fusion cross sections and the barrier distributions are in agreement with the experimental data after renormalization of the nuclear potential due to coupled-channel effect.

Key words: nucleon--nucleon interaction, double folding model, fusion

中图分类号:  (Nuclear forces)

  • 21.30.-x
24.10.Eq (Coupled-channel and distorted-wave models) 25.70.Jj (Fusion and fusion-fission reactions) 27.80.+w (190 ≤ A ≤ 219)