Measurement of Photoneutrons from Depleted Uranium and Comparison Study Using MCNPX-PoliMi

High-energy photon interrogation is a nondestructive technique that used to detect special nuclear materials and characterize waste. The development of such systems complex requires Monte Carlo simulations optimize system performance. rely on various scattering, absorption, photonuclear cross-section data. While the scattering absorption data have been extensively studied validated with experiments, results obtained from are often found underpredict measured results, indicating uncertainties in cross sections themselves. Thus, there need for new can be quantify underpredictions using In present work, we interrogated depleted uranium 9-MV electron linac detected photoneutrons trans-stilbene organic scintillators. measurement scintillators challenging due presence intense flux, which causes issues as pulse pile-up, detector saturation, poor signal-to-background ratio. To mitigate these challenges, iron polyethylene shielding varying thicknesses around target neural network–based digital processing algorithm recover neutron information piled-up events. Our goal was compare photoneutron count rate simulated MCNPX-PoliMi transport code. For light output window 0.28 2.67 MeVee (1.66- 6.85-MeV proton recoil energy), ENDF/B-VII library underpredicts by 32.8% ± 3.2%. Additionally, compared distributions. least shielding, simulation measurements 0.70- 2.67-MeVee window. greatest across entire MeVee.