Prompt ssion neutron energy spectrum of 252 Cf in center of mass and laboratory systems

Abstract

In this work we discuss the in uence of different forms of prompt ssion neutron energy spectra in the ssion fragment center of mass system on the laboratory spectrum of neutrons in spontaneous ssion of 252 Cf . We show that the Le Couteur spectrum, which takes into account multiple neutron emission of neutrons in the center of mass system, describes the observed neutron energy spectrum well when transformed to the laboratory system.