Monte Carlo simulation of prompt fission gamma emission
Monte Carlo simulation of prompt fission gamma emission
复制标题
瞬发裂变伽马发射的蒙特卡罗模拟
DOI：
10.1016/j.phpro.2012.04.009
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
O. Serot
中科院分区：
文献类型：
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作者：
D. Regnier;O. Litaize;O. Serot
本文用新近开发的蒙特卡罗程序FIFRELIN研究了瞬发裂变γ能谱和多重数。到目前为止，该程序主要用于研究激发态裂变碎片（FF）发射的瞬发中子的特性（能谱和多重性）。当瞬发中子发射结束时，假设FF的剩余可用激发能量作为瞬发伽马发射耗散。一个算法，类似于F。Becvar [2]用于处理伽马级联，已在代码中实现。它是基于已知的离散水平的激发片段，以及理论模型需要计算的水平密度和强度函数。所有核结构数据均由RIPL3.0库提供[3]。给出了有关单个核的γ退激发谱和多重性的初步结果。还着重介绍了~（252）Cf自发裂变的总γ谱。讨论了几种方法、模型和假设对计算裂变γ能谱的影响，并展望了这种模拟的前景。
Prompt fission gamma spectra and multiplicities are investigated through the Monte Carlo code FIFRELIN which has been developed recently [1]. Up to now, this code was mainly used to study the characteristics (spectrum and multiplicity) of the prompt neutrons emitted from excited Fission Fragments (FF). When prompt neutron emission is over, the remaining available excitation energy of the FF is assumed to be dissipated as prompt gamma emission. An algorithm, similar to the one used by F. Becvar [2] to treat gamma cascades, has been implemented into the code. It is based on the known discrete levels of the excited fragments as well as on the theoretical models needed to calculate level densities and strength functions. All nuclear structure data are provided by the RIPL3.0 library [3]. Preliminary results relative to gamma deexcitation spectrum and multiplicity for single nuclei are presented. A total gamma spectrum for252Cf spontaneous fission is also emphasized. Influence of the several methods, models and assumptions on the calculated fission gamma spectra is discussed as well as the prospective for such a simulation.