Prompt $\gamma$ rays and neutrons from fission

Nuclear data are needed to test the accuracy of calculations from nuclear reaction codes. Information on the prompt $\gamma$-ray distributions from fission is sparse and only a handful of published experiments data that measured the prompt $\gamma$-ray distribution above incident neutron energies of 1 MeV can be found. In addition, improvement on the accuracy and shape of neutron spectrum from the fission of actinides been requested by the nuclear data community\footnote{``Prompt Fission Neutron Spectra of Major Actinides,'' INDC(NDS)-0571, ed. R. Capote Noy, (2010).}. An investigation on the shapes of the neutron and $\gamma$-ray distributions from the spontaneous fission of $^{252}$Cf and the neutron-induced fission of $^{235}$U was undertaken using the Chi-Nu detector array at the Weapons Neutron Research Facility of the Los Alamos Neutron Science Center. Preliminary results will be presented.