| Calculation of prompt fission neutron spectra for 235U(n,f) |
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| 作者姓名： | 陈永静 贾敏 陶曦 钱晶 刘廷进 舒能川 |
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| 作者单位： | 1. China Nuclear Data Center, China Institute of Atomic Energy, Beijing 102413, China;;2. Department of Mathematics and Information Science, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China |
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| 基金项目： | Supported by IAEA-CRP(15905);the State Key Laboratory of Nuclear Physics and Technology,Peking University(SKL-NPT) |
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| 摘 要： | The prompt fission neutron spectra for the neutron-induced fission of 235U at En < 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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| 关 键 词： | fission fragment prompt fission neutron spectra nuclear temperature neutron multiplicity |
| 收稿时间： | 2011-7-21 |
| 修稿时间： | 2011-7-28 |
Calculation of prompt fission neutron spectra for 235U（n,f ） |
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| CHEN Yong-Jing,;,JIA Min,TAO Xi,QIAN Jing,LIU Ting-Jin,SHU Neng-Chuan.Calculation of prompt fission neutron spectra for 235U(n,f)[J].High Energy Physics and Nuclear Physics,2012,36(4):322-328. |
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| Authors: | CHEN Yong-Jing ; JIA Min TAO Xi QIAN Jing LIU Ting-Jin SHU Neng-Chuan |
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| Institution: | 1 China Nuclear Data Center, China Institute of Atomic Energy, Beijing 102413, China 2 Department of Mathematics and Information Science, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China |
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| Abstract: | The prompt fission neutron spectra for the neutron-induced fission of 235U at En < 5 MeV are calculated using nuclear evaporation theory with a semi-empirical model, in which the nonconstant and con- stant 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)+235 U 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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| Keywords: | fission fragment prompt fission neutron spectra nuclear temperature neutron multiplicity |
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