Abstract The improved version of Los Alamos model with the multi-modal fission approach is used to analyse the prompt fission neutron spectrum and multiplicity for the neutron-induced fission of 237Np. The spectra of neutrons emitted from fragments for the three most dominant fission modes (standard I, standard II and superlong) are calculated separately and the total spectrum is synthesized. The multi-modal parameters contained in the spectrum model are determined on the basis of experimental data of fission fragment mass distributions. The calculated total prompt fission neutron spectrum and multiplicity are better agreement with the experimental data than those obtained from the conventional treatment of the Los Alamos model.
Received: 01 December 2008
Revised: 04 December 2008
Accepted manuscript online:
Fund: Project supported by the State Key Development Program for Basic Research of China (Grant Nos 2008CB717803 and 2007ID103) and the Research Fund for the Doctoral Program of Higher Education of China (Gant No 200610001023).
Cite this article:
Zheng Na(郑娜), Ding Yi(丁毅), Zhong Chun-Lai(钟春来), Chen Jin-Xiang(陈金象), and Fan Tie-Shuan(樊铁栓) Analysis of prompt fission neutron spectrum and multiplicity for 237Np(n, f) in the frame of multi-modal Los Alamos model 2009 Chin. Phys. B 18 1413
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