Registration of Delayed Neutrons from U-238 Photofission at E-gamma max congruent to 10 MeV in Interval (1-5) ms after Beam Pulses of the Electron Accelerator

In this article, we describe an experimental verification of the correctness of registration of delayed neutrons from U-238 photofission at a maximum energy of 10 MeV of bremsstrahlung gamma quanta on a pulsed linear electron accelerator LUE-8-5 in an interval of (1-5) ms after each beam pulse at times greater than or similar to 7 min from the onset of irradiation. The measurements have been carried out using the scintillation spectrometer of fast neutrons based on a single stilbene crystal with pulse shape discrimination of gamma quanta and fast neutrons. The temporal dependence of the counting rate of delayed neutrons in U-238 photofission has been measured at a repetition rate of 300 s(-1) in a time interval of (1.25-3.30) ms after the beam pulse.