An absolute determination of the average number of neutrons, ῡ, emitted in the spontaneous fission of Cf252 has been made by counting the fission neutrons in a large liquid scintillator. The detection efficiency of this counter was measured as a function of neutron energy. Well-collimated neutrons were scattered into the scintillator by an anthracene crystal, which detected the corresponding recoil protons. Pulse-shape discrimination was employed to eliminate γ-ray background. The average number of prompt neutrons emitted per Cf252 fission was found to be 3.799 ± 0.034.
No takes yet. Share an insight, caveat, or question.
Asplund-Nilsson et al. (1963) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: