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Chinese Physics C> 1999, Vol. 23> Issue(4) : 328-333 

The Angular Distributions of intermediate Mass Fragments Emittsd in 30 MeV/u 40Ar+58,64Ni and 115In Reactions

  •  Institute of Modern Physics,The Chinese Academy of sciences, Lanzhou 730000

  • The angular distributions of intermediate mass fragments with Z=3-19 emitted in 30 MeV/u 40Ar+58,64Ni and 115In reactions over an angular range of 5°—140°have been measured.Exponential distribution function: dσ/dΩ=N·exp(-θ/a) was used tO fit the measured angular distributions.We have extracted the decay factor a that can be connected with the interaction time τ, and the factor N that is related to the intensity of the emission source.The relationships of a(Z) with Z and N(Z) with Z for different reaction systems and different angular ranges have been discussed. The dependence of angular distributions on isospin and the symmetry of reaction system have also been discussed.
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    [1] Xu Hushan et al.Nucl Sci.and Tech., 1996, 7: 198–201 2 Zhu Y T et al. Journal of Qingdao University(Quarterly)(in Chinese), 1997, 10:35—37(诸永泰等.青岛大学学报(自然科学版),1997,10:35—37)3 Xu Hushan et al. Chin.Phys.Lett,1997,14:413–416 4 Liu G X et al. High Energy Physics and Nuclear Physics(in Chinese),1997,21:777—782(刘国兴等.高能物理与核物理,1997,21:777—782)5 Guerreau D. Nucl. Phys., 1985, A447:37c—66c6 Qian Tao et al.Chin.Phys.Lett.,1998,15:255–2577 Kiss A et al.Nucl. Phys., 1989, A499:131—1478 Qan X et al.High Energy Physics and Nuclear Physics(in Chinese),1996,20:304—309(钱兴等.高能物理与核物理,1996,20:304—309)9 Wu H Y et al. Nucl.Phys.,1997,A617:385–394 10 Sangster T C et al、Phys. Rev., 1992, C46: 1404–141511 Royer G et al. Nucl. Phys., 1987, A466:139—156 12 Borderie B et al. Z. Phys., 1984, A318:315–321 13 Borderie B et al. Phys. Lett, 1988, B205:26—29 14 Hirsh A S et al. Phys. Rev., 1984, C29:508–52515 Rami F et al. Z. Phys., 1987, A327:207—21616 Sosin Z et al. Nucl. Phys., 1994, A574:474–500 17 Wile J L et al. Phys. Rev., 1992, C45:2300–2319

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Gou Quanbu, Zhu Yongtai, Xu Hushan, Wei Zhiyong, Lu Jun, Zhang Yuhu, Wang Qi, Li Songlin and Wu Zhongli. The Angular Distributions of intermediate Mass Fragments Emittsd in 30 MeV/u 40Ar+58,64Ni and 115In Reactions[J]. Chinese Physics C, 1999, 23(4): 328-333.
Gou Quanbu, Zhu Yongtai, Xu Hushan, Wei Zhiyong, Lu Jun, Zhang Yuhu, Wang Qi, Li Songlin and Wu Zhongli. The Angular Distributions of intermediate Mass Fragments Emittsd in 30 MeV/u 40Ar+58,64Ni and 115In Reactions[J]. Chinese Physics C, 1999, 23(4): 328-333. shu
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Received: 1998-05-25
Revised: 1900-01-01
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The Angular Distributions of intermediate Mass Fragments Emittsd in 30 MeV/u 40Ar+58,64Ni and 115In Reactions

    Corresponding author: Gou Quanbu,
  • Institute of Modern Physics,The Chinese Academy of sciences, Lanzhou 730000
  • Received Date: 1998-05-25
  • Accepted Date: 1900-01-01
  • Available Online: 1999-04-05

Abstract: The angular distributions of intermediate mass fragments with Z=3-19 emitted in 30 MeV/u 40Ar+58,64Ni and 115In reactions over an angular range of 5°—140°have been measured.Exponential distribution function: dσ/dΩ=N·exp(-θ/a) was used tO fit the measured angular distributions.We have extracted the decay factor a that can be connected with the interaction time τ, and the factor N that is related to the intensity of the emission source.The relationships of a(Z) with Z and N(Z) with Z for different reaction systems and different angular ranges have been discussed. The dependence of angular distributions on isospin and the symmetry of reaction system have also been discussed.

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