Title: Calculation of Fission Fragment Yields for thermal neutron reaction of $^{239}$Pu Show Chinese title

Title: Calculation of Fission Fragment Yields for thermal neutron reaction of $^{239}$Pu

Abstract: Fission fragment yield evaluation in the past has been done mainly by considering independent and cumulative fission yields. In addition to them, the fission fragment yields are related to various observables such as total kinetic energy, prompt fission neutron, decay heats, etc. Various improvements were carried out in the fission fragment yield evaluation of JENDL-5, however it did not consider correlations between such fission observables and fragment yields. A new evaluation including fission observables is thus required for next generation of evaluated data. We recently developed a new calculation system using CCONE code to calculate fission fragment yields. This calculation system enables us to compare various fission observables with the experimental data simultaneously. In this work, we calculated thermal-induced fission of 239Pu. We present the result of prompt fission neutrons, decay heats, and delayed neutrons Show Chinese abstract

Abstract: 过去对裂变碎片产额的评估主要通过考虑独立裂变产额和累积裂变产额来进行。除了这些之外，裂变碎片产额还与总动能、瞬发裂变中子、衰变热等各种可观测量有关。尽管在JENDL-5的裂变碎片产额评估中进行了多项改进，但它并未考虑这些裂变可观测量与碎片产额之间的相关性。因此，下一代评估数据需要一种包括裂变可观测量的新评估方法。我们最近开发了一种基于CCONE代码的新计算系统来计算裂变碎片产额。该计算系统使我们能够同时将各种裂变可观测量与实验数据进行比较。在这项工作中，我们计算了239Pu的热诱发裂变。我们给出了瞬发裂变中子、衰变热和延迟中子的结果。