New Features of the FIFRELIN Code for the Investigation of Fission Fragments Characteristics
New Features of the FIFRELIN Code for the Investigation of Fission Fragments Characteristics
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用于研究裂变碎片特性的 FIFRELIN 代码的新功能
DOI：
10.1016/j.phpro.2012.04.008
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
SŽbastien Onde
中科院分区：
文献类型：
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作者：
O. Litaize;O. Serot;D. Regnier;StŽphane Theveny;SŽbastien Onde
利用FIFRELIN蒙特卡罗模拟程序可以推导出裂变碎片的特性以及瞬发中子和伽马的特性。结果的质量显然取决于实验输入数据、理论和现象学模型以及代码中所做的各种假设。本文的目的是突出代码的新特征，并提供一些精选的新结果，重点是使用随温度变化的自旋截止、快速伽马灭磁能力、基于根的工具来分析FF历史、相关量的估计等。文中还给出了一些实验数据对中子多重数的影响以及能级密度参数模型对裂变可观测值的影响。最后给出了关于1.8 MeV下238U(n，f)反应的中子谱的初步结果。
The characteristics of the fission fragments (FF) as well as those of the prompt neutrons and gammas can be deduced using FIFRELIN Monte Carlo simulation code. The quality of the results obviously depends on the experimental entry data, the theoretical and phenomenological models, and the various assumptions done in the code. The goal of this paper is to highlight new features of the code and to present some selected new results focusing on the use of a temperature-dependent spin cut-off, the prompt gamma de-excitation capability, a ROOT-based tool for the analysis of the FF histories, the estimation of correlated quantities, and so on. The influence of some experimental data on the neutron multiplicity and the influence of the level density parameter models on fission observables are also presented. Finally a preliminary result concerning the neutron spectrum for the 238U(n,f) reaction at 1.8 MeV is shown.