The understanding of the antineutrino production in fission and the theoretical calculation of the antineutrino energy spectra in different, also future, types of fission reactors rely on the application of the summation method, where the individual contributions from the different radioactive nuclides that undergo a beta decay are estimated and summed up. The most accurate estimation of the independent fission-product yields is essential to this calculation. This is a complex task because the yields depend on the fissioning nucleus and on the energy spectrum of the incident neutrons.

In the present contribution, the quality of different sources of information on the fission yields is investigated, and the benefit of a combined analysis is demonstrated. The influence on antineutrino predictions is discussed.

In a systematic comparison, the quality of fission-product yields emerging from different experimental techniques is analyzed. The traditional radiochemical method, which is almost exclusively used for evaluations, provides an unambiguous identification in Z and A, but it is restricted to a limited number of suitable targets, is slow, and the accuracy suffers from uncertainties in the spectroscopic nuclear properties. Experiments with powerful spectrometers, for example at LOHENGRIN, provide very accurate mass yields and a Z resolution for light fission products from thermal-neutron-induced fission of a few suitable target nuclei.

On the theoretical side, the general fission model GEF has been developed. It combines a few general theorems, rules and ideas with empirical knowledge. GEF covers almost all fission observables and is able to reproduce measured data with high accuracy while having remarkable predictive power by establishing and exploiting unexpected systematics and hidden regularities in the fission observables. In this article, we have coupled for the first time the GEF predictions for the fission yields to fission-product beta-decay data in a summation calculation of reactor antineutrino energy spectra. The first comparisons performed between the spectra from GEF and those obtained with the evaluated nuclear databases exhibited large discrepancies that highlighted the exigency of the modelisation of the antineutrino spectra and showing their usefulness in the evaluation of nuclear data. Additional constraints for the GEF model were thus needed in order to reach the level of accuracy required by the antineutrino energy spectra. The combination of a careful study of the independent isotopic yields and the adjunction of the LOHENGRIN fission-yield data as additional constraints led to a substantially improved agreement between the antineutrino spectra computed with GEF and with the evaluated data. The comparison of inverse beta-decay yields computed with GEF with those measured by the Daya Bay experiment shows the excellent level of predictiveness of the GEF model for the fundamental or applied antineutrino physics.

The main results of this study are:

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an improved agreement between the antineutrino energy spectra obtained with the newly tuned GEF model and the JEFF-3.1.1 and JEFF-3.3 fission yields for the four main contributors to fission in standard power reactors;

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indications for shortcomings of mass yields for ²⁴¹Pu(n_th, f) and other systems in current evaluations;

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a demonstration of the benefit from cross-checking the results of different experimental approaches and GEF for improving the quality of nuclear data;

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an analysis of the sources of uncertainties and erroneous results from different experimental approaches;

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the capacity of GEF for predicting the fission yields (and other observables) in cases (in terms of fissioning systems and excitation energies) which are presently not accessible to experiment;

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predictions of antineutrino energy spectra that aim to assess the prospects for reactor monitoring, and based on the GEF fission yields associated with the beta-decay data of the most recent summation model.

对裂变中抗中微子产生的理解以及在不同的，以及将来的裂变反应堆类型中抗中微子能谱的理论计算，都依赖于求和方法的应用，在求和方法中，来自不同放射性核素经历β衰变的各个贡献被估计和总结。独立裂变产物收率的最准确估算对于此计算至关重要。这是一项复杂的任务，因为产量取决于裂变核和入射中子的能谱。

在目前的贡献中，研究了关于裂变产率的不同信息来源的质量，并证明了组合分析的好处。讨论了对抗中微子预测的影响。

在系统的比较中，分析了来自不同实验技术的裂变产物产率的质量。传统的放射化学方法几乎专门用于评估，可在Z和A中提供明确的鉴定，但仅限于有限数量的合适目标，反应缓慢，并且准确性受到光谱核特性不确定性的影响。使用强大的光谱仪进行的实验（例如在LOHENGRIN进行的实验）可提供非常准确的质量产率，以及由热中子诱发的几个合适目标核裂变而产生的光裂变产物的Z分辨率。

从理论上讲，已经开发了通用裂变模型GEF。它结合了一些具有经验知识的一般性定理，规则和思想。GEF涵盖了几乎所有裂变观测物，并能够通过建立和利用裂变观测物中意外的系统性和隐含规律性，以高精度再现测量数据，同时具有显着的预测能力。在本文中，我们首次在反应堆抗中微子能谱的总和计算中将裂变产率的GEF预测与裂变产物β衰变数据相结合。来自GEF的光谱与通过评估的核数据库获得的光谱之间进行的首次比较显示出很大的差异，突出了抗中微子光谱建模的紧迫性，并显示了它们在评估核数据中的有用性。因此，为了达到抗中微子能谱要求的精度水平，需要对GEF模型施加其他约束。对独立同位素产率的仔细研究与LOHENGRIN裂变产率数据的附加作为附加约束的结合，导致用GEF计算的抗中微子谱与评估数据之间的一致性得到了显着改善。

这项研究的主要结果是：

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新调整的GEF模型获得的抗中微子能谱与标准功率反应堆中导致裂变的四个主要因素的JEFF-3.1.1和JEFF-3.3裂变产率之间的改进一致性；

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当前评估中²⁴¹ Pu（n _th，f）和其他系统的大量产量不足的迹象;

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证明交叉检查不同实验方法和全环基金的结果对改善核数据质量的好处；

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分析来自不同实验方法的不确定性和错误结果的来源；

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在目前尚无法进行实验的情况下（根据裂变系统和激发能），全球环境基金有能力预测裂变产量（和其他可观察到的）；

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中微子能谱的预测，旨在评估反应堆监测的前景，并基于与最新求和模型的β衰变数据相关的GEF裂变产率。