论文标题
中子诱导的裂变片段角度分布，各向异性和线性动量转移，用Niffte裂变时间投影室测量
Neutron Induced Fission Fragment Angular Distributions, Anisotropy, and Linear Momentum Transfer Measured with the NIFFTE Fission Time Projection Chamber
论文作者
论文摘要
中子诱导的裂变片段跟踪实验（NIFFTE）协作已通过裂变时间投影室（FissionTPC）进行了测量，以通过重建完整的裂变片段和其他电离辐射的三维轨道来研究裂变过程。可以通过测量裂变片段之间的开头角度来推断，可以推断出入射中子的线性动量的量。使用这种测量的线性动量，可以将裂变片段分布转换为质量框架以进行各向异性测量。角各向异性是可以观察到的重要实验，可用于了解裂变核的量子机械状态，并且对于确定横截面测量值的检测效率至关重要。中子线性动量转移到裂变$^{235} $ u，$^{238} $ u，以及$^{239} $ pu和裂变片段和裂变片段的角色偏见为$^{235} $ u和$ u和$^{238} $ u，是范围130 kev-250 mev的中性能量。
The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) collaboration has performed measurements with a fission time projection chamber (fissionTPC) to study the fission process by reconstructing full three-dimensional tracks of fission fragments and other ionizing radiation. The amount of linear momentum imparted to the fissioning nucleus by the incident neutron can be inferred by measuring the opening angle between the fission fragments. Using this measured linear momentum, fission fragment angular distributions can be converted to the center-of-mass frame for anisotropy measurements. Angular anisotropy is an important experimental observable for understanding the quantum mechanical state of the fissioning nucleus and vital to determining detection efficiency for cross section measurements. Neutron linear momentum transfer to fissioning $^{235}$U, $^{238}$U, and $^{239}$Pu and fission fragment angular anisotropy of $^{235}$U and $^{238}$U as a function of neutron energies in the range 130 keV--250 MeV are presented.
