The Calculation of Prompt Fission Neutron from <sup>233</sup>U(n, f) Reaction by Multi-Modal Los Alamos Model

ZHENG Na (郑娜); ZHONG Chunlai (钟春来); FAN Tieshuan(樊铁栓)

doi:10.1088/1009-0630/14/6/19

Plasma Science and Technology > 2012 > 14(6): 521-525. > DOI: 10.1088/1009-0630/14/6/19

ZHENG Na (郑娜), ZHONG Chunlai (钟春来), FAN Tieshuan(樊铁栓). The Calculation of Prompt Fission Neutron from ²³³U(n, f) Reaction by Multi-Modal Los Alamos Model[J]. Plasma Science and Technology, 2012, 14(6): 521-525. DOI: 10.1088/1009-0630/14/6/19

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The Calculation of Prompt Fission Neutron from ²³³U(n, f) Reaction by Multi-Modal Los Alamos Model

State Key Laboratory of Nuclear Physics and Nuclear Technology and School of Physics, Peking University, Beijing 100871, China

Funds: Supported by the state Key Development program for Basic Research of China (Nos. 2008CB717803, 2009GB107001, and 2007CB209903), the Research Fund for the Doctoral Program of Higher Education of China ( No. 200610011023)

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Received Date: May 16, 2011

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Abstract

Abstract

An attempt is made to improve the evaluation of the prompt fission neutron emission from 2³³U(n, f) reaction for incident neutron energies below 6 MeV. The multi-modal fission approach is applied to the improved version of Los Alamos model and the point by point model. The prompt fission neutron spectra and the prompt fission neutron as a function of fragment mass (usually named “sawtooth” data) are calculated independently for the three most dominant fission modes (standard I, standard II and superlong), and the total spectra and are synthesized. The multi-modal parameters are determined on the basis of experimental data of fission fragment mass distributions. The present calculation results can describe the experimental data very well, and the proposed treatment is thus a useful tool for prompt fission neutron emission prediction.
- ²³³U(n, f),
- prompt fission neutron,
- , multi-modal model,
- Los Alamos model

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