论文标题
Hauser-Feshbach裂变片段衰减模型的扩展到多概率裂变
Extension of the Hauser-Feshbach Fission Fragment Decay Model to Multi-Chance Fission
论文作者
论文摘要
Hauser-feshbach裂变片段衰减模型，$ \ mathtt {Hf^3d} $，该模型计算出裂变片段的统计衰减，已扩展为包括多观念裂变，最多为20 MEV的中子事件能量。确定性的衰减将输入前缩减量 - 裂变概率以及导致裂变的平均能量 - 和缩减后数量 - 质量，电荷，总动能，自旋和平等的收益率。从这些裂变片段的初始条件中，通过及时和延迟的颗粒排放遵循完整的衰减，从而可以计算迅速中子和$γ$属性，例如多重性和能量分布，包括独立和累积的裂变产率，以及延迟的中子可观察力。在这项工作中，我们使用中子诱导的$^{235} $ u的示例来描述$ \ mathtt {Hf^3D} $模型中的多概率裂变的实现。这种扩展代表着始终如一地建模裂变系统的迅速和延迟颗粒的发射。
The Hauser-Feshbach fission fragment decay model, $\mathtt{HF^3D}$, which calculates the statistical decay of fission fragments, has been expanded to include multi-chance fission, up to neutron incident energies of 20 MeV. The deterministic decay takes as input pre-scission quantities - fission probabilities and the average energy causing fission - and post-scission quantities - yields in mass, charge, total kinetic energy, spin, and parity. From these fission fragment initial conditions, the full decay is followed through both prompt and delayed particle emissions, allowing for the calculation of prompt neutron and $γ$ properties, such as multiplicity and energy distributions, both independent and cumulative fission yields, and delayed neutron observables. In this work, we describe the implementation of multi-chance fission into the $\mathtt{HF^3D}$ model, and show an example of prompt and delayed quantities beyond first-chance fission, using the example of neutron-induced fission on $^{235}$U. This expansion represents significant progress in consistently modeling the emission of prompt and delayed particles from fissile systems.
