Analysis of prompt fission neutron spectrum and multiplicity for 237Np(n,f)in the frame of multi-modal Los Alamos model

• 来源期刊: 中国物理B（英文版）
• 关键词: 237Np(n f) prompt neutron spectrum neutron multiplicity multi-modal model Los Alamos model
• 年，卷（期）: 2009,（4）
• 页码范围: 1413-1420
• 页数: 8页
• 语种: 英文

摘要

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 I~eutrons 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.