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Systematics on fission fragment mass distribution of neutron induced 235U fission

  • Based on the neutron induced fission fragment mass distribution data up to neutron energy 20MeV measured with the double kinetic energy method (KEM) and the radio active method (RAM), the systematics of fission fragment mass distribution was investigated by using 5 Gaussian model and the systematics parameters were obtained by fitting the experimental data. With the systematics, the yields of any mass A and at any energy in the region from 0 to 20MeV of neutron energy can be calculated. The calculated results could well reproduce the experimental data measured with KEM, but show some systematical deviation from the data measured by RAM, which reflects some systematical deviations between the two kinds of measured data. The error of systematics yield was calculated in an exact error transformation way, including from the error of the experimental yield data to the error of the discrete parameters, then to the systematics parameters, and at last to the yield calculated with systematics.
  • [1] . Wahl A C. "Systematics of Fission-Product Yields", apaper Presented on 3rd Research Co-ordination Meetingon \Fission Product Yield Data Required for Transmuta-tion of Minor Actinide Nuclear Waste" IAEA, Vienna, 29October-02 November, 20012. Strittmatter R B, Wehring B W. Trans. Amer. Nucl. Soc.,1977, 27: 8623. Diiorio G, Wehring B W. Nucl. Instrum. Methods B, 1977,147: 4874. Siegert G, Wollnik H, Greif J et al. Phys. Rev. C, 1976, 14:18645. Maeck W J. Fast Reactor Fission Yields for 233U, 235U,238U, 239Pu and Recommendations for the Determinationof Burnup on FBR Mixed Oxide Fuels. Conf. on Nucl.Cross-Sections and Technology, Washington D. C., 3-7March, 1975, 1: 3786. Mandler J W, Reed J H, Moler R B. Bull. Amer. Phys.Soc., 1973, 18: 7687. BAO Jie, YANG Yi, LIU Yong-Hui et al. Comm. of Nucl.Data Progress, 2001, 26: 88. FENG Jing, LIU Yong-Hui, YANG Yi et al. Comm. ofNucl. Data Progress, 2001, 25: 49. LIU Ting-Jin, LIANG Qi-Chang. The Evaluated ReferenceFission Yield Data File, CNIC-01679, Beijing: China Nu-clear Industry Audio and Visual Publishing House, 200210. LIU Ting-Jin, SUN Zheng-Jun. Comm. of Nucl. DataProgress, 2002, 28: 5211. LIU Ting-Jin, SUN Zheng-Jun, SHU Neng-Chuan. Engi-neering Sciences, 2005, 3(4): 50
  • [1] . Wahl A C. "Systematics of Fission-Product Yields", apaper Presented on 3rd Research Co-ordination Meetingon \Fission Product Yield Data Required for Transmuta-tion of Minor Actinide Nuclear Waste" IAEA, Vienna, 29October-02 November, 20012. Strittmatter R B, Wehring B W. Trans. Amer. Nucl. Soc.,1977, 27: 8623. Diiorio G, Wehring B W. Nucl. Instrum. Methods B, 1977,147: 4874. Siegert G, Wollnik H, Greif J et al. Phys. Rev. C, 1976, 14:18645. Maeck W J. Fast Reactor Fission Yields for 233U, 235U,238U, 239Pu and Recommendations for the Determinationof Burnup on FBR Mixed Oxide Fuels. Conf. on Nucl.Cross-Sections and Technology, Washington D. C., 3-7March, 1975, 1: 3786. Mandler J W, Reed J H, Moler R B. Bull. Amer. Phys.Soc., 1973, 18: 7687. BAO Jie, YANG Yi, LIU Yong-Hui et al. Comm. of Nucl.Data Progress, 2001, 26: 88. FENG Jing, LIU Yong-Hui, YANG Yi et al. Comm. ofNucl. Data Progress, 2001, 25: 49. LIU Ting-Jin, LIANG Qi-Chang. The Evaluated ReferenceFission Yield Data File, CNIC-01679, Beijing: China Nu-clear Industry Audio and Visual Publishing House, 200210. LIU Ting-Jin, SUN Zheng-Jun. Comm. of Nucl. DataProgress, 2002, 28: 5211. LIU Ting-Jin, SUN Zheng-Jun, SHU Neng-Chuan. Engi-neering Sciences, 2005, 3(4): 50
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LIU Ting-Jin, SUN Zheng-Jun and SHU Neng-Chuan. Systematics on fission fragment mass distribution of neutron induced 235U fission[J]. Chinese Physics C, 2008, 32(7): 556-560. doi: 10.1088/1674-1137/32/7/009
LIU Ting-Jin, SUN Zheng-Jun and SHU Neng-Chuan. Systematics on fission fragment mass distribution of neutron induced 235U fission[J]. Chinese Physics C, 2008, 32(7): 556-560.  doi: 10.1088/1674-1137/32/7/009 shu
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Received: 2007-08-13
Revised: 2007-10-19
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Systematics on fission fragment mass distribution of neutron induced 235U fission

    Corresponding author: SHU Neng-Chuan,

Abstract: Based on the neutron induced fission fragment mass distribution data up to neutron energy 20MeV measured with the double kinetic energy method (KEM) and the radio active method (RAM), the systematics of fission fragment mass distribution was investigated by using 5 Gaussian model and the systematics parameters were obtained by fitting the experimental data. With the systematics, the yields of any mass A and at any energy in the region from 0 to 20MeV of neutron energy can be calculated. The calculated results could well reproduce the experimental data measured with KEM, but show some systematical deviation from the data measured by RAM, which reflects some systematical deviations between the two kinds of measured data. The error of systematics yield was calculated in an exact error transformation way, including from the error of the experimental yield data to the error of the discrete parameters, then to the systematics parameters, and at last to the yield calculated with systematics.

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