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Chinese Physics C> 2010, Vol. 34> Issue(1) : 49-55 DOI: 10.1088/1674-1137/34/1/009

Multi-modal analysis for low energy neutron-induced fission of 235U

  • Low energy neutron induced fission of 235U is studied in the framework of the multi-modal fission model. The fission fragment properties, such as the yields, the average total kinetic energy distribution and the average neutron separation energy, are investigated for incident neutron energies from thermal to 6.0 MeV. The multi-modal fission approach is also used to evaluate the prompt fission neutron multiplicity and spectra for the neutron-induced fission of 235U with an improved version of the Los Alamos model for incident neutrons below the (n, nf) threshold. The three most dominant fission modes are taken into account. The model parameters are determined on the basis of experimental data. The calculated results are in good agreement with the experimental data.

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ZHENG Na, FAN Tie-Shuan, DING Yi, ZHONG Chun-Lai, LI Xiang-Qing and CHEN Jin-Xiang. Multi-modal analysis for low energy neutron-induced fission of 235U[J]. Chinese Physics C, 2010, 34(1): 49-55. doi: 10.1088/1674-1137/34/1/009
ZHENG Na, FAN Tie-Shuan, DING Yi, ZHONG Chun-Lai, LI Xiang-Qing and CHEN Jin-Xiang. Multi-modal analysis for low energy neutron-induced fission of 235U[J]. Chinese Physics C, 2010, 34(1): 49-55.  doi: 10.1088/1674-1137/34/1/009 shu
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Received: 2009-02-24
Revised: 2009-05-21
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Multi-modal analysis for low energy neutron-induced fission of 235U

    Corresponding author: FAN Tie-Shuan,
  • Received Date: 2009-02-24
  • Accepted Date: 2009-05-21
  • Available Online: 2010-01-05

Abstract: 

Low energy neutron induced fission of 235U is studied in the framework of the multi-modal fission model. The fission fragment properties, such as the yields, the average total kinetic energy distribution and the average neutron separation energy, are investigated for incident neutron energies from thermal to 6.0 MeV. The multi-modal fission approach is also used to evaluate the prompt fission neutron multiplicity and spectra for the neutron-induced fission of 235U with an improved version of the Los Alamos model for incident neutrons below the (n, nf) threshold. The three most dominant fission modes are taken into account. The model parameters are determined on the basis of experimental data. The calculated results are in good agreement with the experimental data.

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