Calculation of prompt fission neutron spectra for <SUP>235</SUP>U(n,f)

CHEN Yong-Jing; JIA Min; TAO Xi; QIAN Jing; LIU Ting-Jin; SHU Neng-Chuan

doi:10.1088/1674-1137/36/4/005

Chinese Physics C> 2012, Vol. 36> Issue(4) : 322-328 DOI: 10.1088/1674-1137/36/4/005

Calculation of prompt fission neutron spectra for ²³⁵U(n,f)

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The prompt fission neutron spectra for the neutron-induced fission of ²³⁵U at E_n < 5 MeV are calculated using nuclear evaporation theory with a semi-empirical model, in which the nonconstant and constant temperatures related to the Fermi gas model are taken into account. The calculated prompt fission neutron spectra reproduce the experimental data well. For the n(thermal)+²³⁵U reaction, the average nuclear temperature of the fission fragment, and the probability distribution of the nuclear temperature, are discussed and compared with the Los Alamos model. The energy carried away by γ rays emitted from each fragment is also obtained and the results are in good agreement with the existing experimental data.

References

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CHEN Yong-Jing, JIA Min, TAO Xi, QIAN Jing, LIU Ting-Jin and SHU Neng-Chuan. Calculation of prompt fission neutron spectra for ²³⁵U(n,f)[J]. Chinese Physics C, 2012, 36(4): 322-328. doi: 10.1088/1674-1137/36/4/005

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Received: 2011-07-21
Revised: 2011-07-28

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Calculation of prompt fission neutron spectra for ²³⁵U(n,f)

Received Date: 2011-07-21

Accepted Date: 2011-07-28

Available Online: 2012-04-05

Abstract: The prompt fission neutron spectra for the neutron-induced fission of ²³⁵U at E_n < 5 MeV are calculated using nuclear evaporation theory with a semi-empirical model, in which the nonconstant and constant temperatures related to the Fermi gas model are taken into account. The calculated prompt fission neutron spectra reproduce the experimental data well. For the n(thermal)+²³⁵U reaction, the average nuclear temperature of the fission fragment, and the probability distribution of the nuclear temperature, are discussed and compared with the Los Alamos model. The energy carried away by γ rays emitted from each fragment is also obtained and the results are in good agreement with the existing experimental data.

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Calculation of prompt fission neutron spectra for ²³⁵U(n,f)

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Calculation of prompt fission neutron spectra for 235U(n,f)

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Calculation of prompt fission neutron spectra for 235U(n,f)

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Calculation of prompt fission neutron spectra for ²³⁵U(n,f)

Calculation of prompt fission neutron spectra for ²³⁵U(n,f)