Precision Measurements of Prompt Neutron Spectra in ~(240)Pu and ~(242)Pu Spontaneous Fission

摘要

Under the Program of Measurements of prompt Neutron Spectra in Minor Actinides Fission for Transmutation Purposes carried out at the V.G. Khlopin Radium Institute the integral neutron spectra in the ~(240)Pu and ~(242)Pu spontaneous fission have been measured. The measurements were performed by the time-of-flight method in the energy range of 0.1-15 MeV relative to the standard neutron spectrum in ~(252)Cf spontaneous fission. The accuracies of the average neutron spectrum energies are better than 2%. The theoretical computation of the prompt neutron spectra in the ~(240)Pu and ~(242)Pu spontaneous fission was performed in the framework of statistical approach using Hauser-Feschbach model.