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Chinese Physics C> 1996, Vol. 20> Issue(4) : 304-310 

Evaporation of Intermediate-Mass Fragments From Hot-Nuclei in Reaction 40Ar+159Tb at 25MeV/u

  •  Department of Technical Physics,Peking University, Beijing 1008712 Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000

  • The inclusive energy spectra of intermediate-mass fragments(IMF)(3≤Z≤9)have been measured in the range from 20°to 155°for 40Ar+159Tb reaction at 25MeV/u.At backward angles,the spectra of IMF show a characteristic of statistic evaporation and can be well fitted by a moving source with same parameters.The obtained source velocity and temperature are in agreement with the corresponding values of hot nuclei produced in an incomplete-fusion process.Therefore,it seems that there IMF are statistically evaporated from a same source.The experimental results have for compared with the predictions of the statistical model using GEMINI code.
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    [1] J.B.Natowitz,Nucl.Phys.,A488（1992）263C;S.Leray,C.Ngo,P.Bouissou et al.,Nucl.Phys.,A531（1991）177.[2]H.W.Barz,J.P.Bondorf,CH.Dasso et al.,Phys Rev.,C46（1992）46;D.H.Gross,Rep.Prop.Phys.,53（1990）605.[3]黄小监、江栋兴、叶沿林等，北京大学学报，27（1991）635.[4]J.F.Ziegler,J.P.Biersack,U.Littmark,The stopping and range ions in solids,Vol.1（Pergamon,Oxford,1985）.[5]S.Leray,Journal de Physique,Colloque,C4（1986）275.[6]D.XJiang,H.Double,J.Galin et al.,Nucl.Phys.,A503（1989）560.[7]R.J.Charity et al.,Nucl.Phys.,A483（1988）371.

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Qian Xing, Jiang Dongxing, Qian Tao, Hua Hui, Lin Junsong, Wu Enjiu, Zheng Jiwen, Jin Genming, Yin Shuzhi, Tan Jilian, Jin Weiyang, Song Mingtao, Li Zuyu, He zhiyong and Wang Sufang. Evaporation of Intermediate-Mass Fragments From Hot-Nuclei in Reaction 40Ar+159Tb at 25MeV/u[J]. Chinese Physics C, 1996, 20(4): 304-310.
Qian Xing, Jiang Dongxing, Qian Tao, Hua Hui, Lin Junsong, Wu Enjiu, Zheng Jiwen, Jin Genming, Yin Shuzhi, Tan Jilian, Jin Weiyang, Song Mingtao, Li Zuyu, He zhiyong and Wang Sufang. Evaporation of Intermediate-Mass Fragments From Hot-Nuclei in Reaction 40Ar+159Tb at 25MeV/u[J]. Chinese Physics C, 1996, 20(4): 304-310. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Evaporation of Intermediate-Mass Fragments From Hot-Nuclei in Reaction 40Ar+159Tb at 25MeV/u

    Corresponding author: Qian Xing,
  • Department of Technical Physics,Peking University, Beijing 1008712 Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000
  • Received Date: 1900-01-01
  • Accepted Date: 1900-01-01
  • Available Online: 1996-04-05

Abstract: The inclusive energy spectra of intermediate-mass fragments(IMF)(3≤Z≤9)have been measured in the range from 20°to 155°for 40Ar+159Tb reaction at 25MeV/u.At backward angles,the spectra of IMF show a characteristic of statistic evaporation and can be well fitted by a moving source with same parameters.The obtained source velocity and temperature are in agreement with the corresponding values of hot nuclei produced in an incomplete-fusion process.Therefore,it seems that there IMF are statistically evaporated from a same source.The experimental results have for compared with the predictions of the statistical model using GEMINI code.

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