Delayed Beta- and Gamma-Ray Production Due to Thermal-Neutron Fission of 239Pu: Tabular and Graphical Spectral Distributions for Times After Fission between 2 and 14000 Sec

摘要

Fission-product decay energy-release rates have been measured for thermal-neutron fission of 239Pu. Samples were irradiated for 1 to 100 sec using the fast pneumatic-tube facility at the Oak Ridge Research Reactor. The resulting beta- and gamma-ray emissions were separately counted for times-after-fission between 2 and 14,000 sec. The raw data were unfolded to provide spectral distributions of moderate resolution. These distributions are given in graphical and tabular form as differential spectral intensity I(E). For comparisons the graphical representations show calculated spectra obtained using the CINDER-10 summation code and the ENDF/B-IV fission yield and decay scheme data base.