Measuring high-energy γ-ray emission accompanying the spontaneous fission of 252Cf nuclei
The probability of high-energy γ-ray emission accompanying the spontaneous fission of 252Cf nuclei in the energy range of 5–60 MeV was measured experimentally. The γ rays were detected by a BGO detector with a size of ∅7.6 × 7.6 cm in coincidence with neutrons detected by an organic polystyrene-based scintillator with a size of ∅6.0 × 2.0 cm. To reject events associated with the cosmic background, we propose an original method that combines rapid digitizing of the pulse shape and the time-of-flight method.