The energy spectra as well as the angular distribution of photo-neutrons, called the double differential cross sections (DDXs) of the ($\gamma$, xn) reaction were measured for 16.6 MeV linearly polarized photons on Pb, Au, Sn, Cu, Fe, and Ti targets. Polarized photons were prepared using the laser Compton scattering technique at BL01, NewSUBARU, Hyogo, Japan. The photo-neutrons were measured using liquid organic scintillators, placed at six different angles. The time-of-flight technique was used to determine the neutron energy. The low energy and high energy components on the DDXs were identified for all the targets. Flat angular dependence was observed for the low energy component; however, a cos(2$\Theta$) distribution was observed for the high energy component, where $\Theta$ is the angle between the photon polarization direction and neutron emission. The angular dependences were parameterized by fitting the experimental data. The obtained parameters were compared with those from previous studies conducted decades ago.

光中子的能谱和角分布，称为（）的双微分截面（DDXs）$\gamma$（xn）反应在Pb，Au，Sn，Cu，Fe和Ti靶上测量了16.6 MeV线性极化光子。使用激光康普顿散射技术在日本兵库县新SUBARU的BL01制备了偏振光子。使用放置在六个不同角度的液体有机闪烁体测量光中子。飞行时间技术用于确定中子能量。确定了所有目标在DDX上的低能和高能成分。对于低能量分量，观察到平坦的角度依赖性；但是，一个cos（2$\Theta$）观察到高能成分的分布，其中 $\Theta$是光子极化方向和中子发射之间的夹角。通过拟合实验数据对角度依赖性进行参数化。将获得的参数与数十年前进行的先前研究的参数进行比较。