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Chinese Physics C> 1999, Vol. 23> Issue(5) : 409-416 

Investigation of Fission Properties in the Reaction 25MeV/u 40Ar+209Bi

  •  Institute of Modern Physics,The Chinese Academy of Sciences, Lanzhou 7300001 Department of Technical physics, Beijing University, Beijing 100871

  • The distribution properties of the total fission kinehc energy and of the mass of fission fragments at different initial excitation energies of hot nuclei in the reaction 25MeV/u 40Ar+209Bi are investigated. The initial excitation energies are obtained according to the linear momentum transfer. The experimental results show that the fission kinetic energy distribution is similar to the case of compound nuclei with lower excitation energy when the initial excitation energy of hot nuclei is below 380MeV. While the inihal excitation energy is above 380MeV, the most probable value of fission kinehc energy increases with the inihal excitahon energy. The fission energy spectra become asymmetric due to an enhancement of the yield at higher kinetic energies, and the width of mass distribution increases rapidly.
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    [1] Wu Enjiu et al. Chinese Jour of Nucl. Phys. 1996, 118: 145–152 2 Yin Suzhi et al、 High Energy Physics and Nuclear Physics(in Chinese), 1996, 118: 145—152 (尹淑芝等.高能物理与核物理,1997,21:680—685) 3 Nebbia G et al. Nuclear Dynamics and Nuclear Disassembly. In: Natowitz J B. thee. of the Symposium. Dallas, Texas: 1989 304–309 4 Grange P et al. Phys Lett, 1996, B96:26; Bhatt K H et al, Phys Rev., 1986, C33:9545 Harar S. Nucl. Phys., 1987, A471:205c–224c6 Nix J K Nucl Phys., 1969, A130:241 7 Garcias F et al.Nuclear Dynamics and Nuclear Disassembly. In: Natowitz J B.Proc. of the Symposium. Dallas, Texas: 1989. 274 8 Hinde D J et al. Nuclear Dynamics and Nuclear Disassembly.In:Natowitz J B.Proc.of the Symposium. Dallas, Texas: 1989. 289–303

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Zheng Jiwen, Wu Enjiu, Xiao Zhigang, Zhang Chun, Yin Shuzhi, Wang Sufang, Jin Genming, Tan Jilian, Jin Weiyang, Song Mingtao, Li Zuyu, Wu Heyu, He Zhiyong, Yin Xu, Peng Xinping, Jiang Dongxing and Qian Xing. Investigation of Fission Properties in the Reaction 25MeV/u 40Ar+209Bi[J]. Chinese Physics C, 1999, 23(5): 409-416.
Zheng Jiwen, Wu Enjiu, Xiao Zhigang, Zhang Chun, Yin Shuzhi, Wang Sufang, Jin Genming, Tan Jilian, Jin Weiyang, Song Mingtao, Li Zuyu, Wu Heyu, He Zhiyong, Yin Xu, Peng Xinping, Jiang Dongxing and Qian Xing. Investigation of Fission Properties in the Reaction 25MeV/u 40Ar+209Bi[J]. Chinese Physics C, 1999, 23(5): 409-416. shu
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Received: 1998-04-21
Revised: 1900-01-01
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Investigation of Fission Properties in the Reaction 25MeV/u 40Ar+209Bi

    Corresponding author: Zheng Jiwen,
  • Institute of Modern Physics,The Chinese Academy of Sciences, Lanzhou 7300001 Department of Technical physics, Beijing University, Beijing 100871
  • Received Date: 1998-04-21
  • Accepted Date: 1900-01-01
  • Available Online: 1999-05-05

Abstract: The distribution properties of the total fission kinehc energy and of the mass of fission fragments at different initial excitation energies of hot nuclei in the reaction 25MeV/u 40Ar+209Bi are investigated. The initial excitation energies are obtained according to the linear momentum transfer. The experimental results show that the fission kinetic energy distribution is similar to the case of compound nuclei with lower excitation energy when the initial excitation energy of hot nuclei is below 380MeV. While the inihal excitation energy is above 380MeV, the most probable value of fission kinehc energy increases with the inihal excitahon energy. The fission energy spectra become asymmetric due to an enhancement of the yield at higher kinetic energies, and the width of mass distribution increases rapidly.

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