Mass Distribution in Fission ofU235by Resonance Neutrons

Radiochemical analyses of samples of ${\mathrm{U}}^{235}$ irradiated with monoenergetic neutrons at 1.1, 3.1, and 9.0 ev indicated that the fission yield of ${\mathrm{Ag}}^{111}$, ${\mathrm{Cd}}^{115}$, and ${\mathrm{Sb}}^{127}$ relative to the yield of ${\mathrm{Sr}}^{89}$ does not change from that produced by thermal neutrons.