裂变产额数据库

裂变产额(Fission yield) 是指原子核裂变产生某种核素的几率，通常分为独立产额(Independent fission yield)和累积产(Cumulative fission yield)。独立产额是指裂变直接产生(发射瞬发中子后，发生β衰变之前)某种核素的几率，累积产额是指裂变直接产生以及通过β衰变累积得到的某种核素的几率。裂变产额是核能、核科学和核工程研究的重要基础核数据之一，在核物理基础研究、反应堆设计和运行、乏燃料处理、核废料管理、核材料保障等领域起着重要作用。裂变产额数据库可以快速查询中国的评价数据库CENDL-TMSR，美国的ENDF/B-VIII.0， 日本的JENDL-4.0以及JEFF-3.3等库中自发裂变或中子诱发裂变产额数据，其中中子诱发裂变入射中子能量包括热能点、裂变谱和14MeV。检索的产额数据类型包括独立产额和累积产额。 除了数据检索功能，该应用系统还可以对裂变产物核的质量分布和电荷分布进行绘图并可以进行缩放，可以查看绘图采用的数据。所有数据显示采用直观的2维表，而不是难于理解的ENDF格式。Fission yield refers to the probability of producing a specific radionuclide during nuclear fission, which is categorized into two types: independent fission yield and cumulative fission yield. Independent fission yield is the probability that a certain radionuclide is directly produced by fission (after emitting prompt neutrons and before β-decay occurs). Cumulative fission yield is the probability of obtaining a specific radionuclide both directly through fission and via cumulative β-decay. Fission yield is one of the fundamental nuclear data essential for research in nuclear energy, nuclear science and nuclear engineering, playing a critical role in fundamental nuclear physics research, reactor design and operation, spent fuel reprocessing, nuclear waste management, nuclear material safeguards and other related fields. This fission yield database allows fast querying of spontaneous fission or neutron-induced fission yield data from multiple evaluated nuclear data libraries, including China's CENDL-TMSR, the U.S. ENDF/B-VIII.0, Japan's JENDL-4.0 and JEFF-3.3. The incident neutron energies for neutron-induced fission cover thermal energy point, fission spectrum and 14 MeV. The retrievable yield data types include independent fission yield and cumulative fission yield. In addition to the data retrieval function, this application system can plot the mass and charge distributions of fission product nuclei, support zoom operations, and enable users to view the raw data used for plotting. All data is presented in intuitive 2-dimensional tables instead of the obscure ENDF format.

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背景与挑战

背景概述

该数据库聚焦核裂变产额数据，涵盖独立产额和累积产额，是核能、核科学及核工程研究的关键基础数据。它支持快速查询多个国际评价数据库中的自发裂变和中子诱发裂变产额，并提供了数据检索、绘图及直观的二维表展示功能。