Long Range Alpha-Particles Emitted in Connection with Fission. Preliminary Report

Alpha-particles are emitted in coincidence (i.e., within 5×${10}^{-6\mathrm{}}$ sec.) with fission by ${\mathrm{U}}^{235}$ and ${\mathrm{Pu}}^{239}$. The maximum range observed corresponds to an energy of 16 Mev. About one alpha per 250 fissions is emitted by ${\mathrm{U}1\mathrm{}}^{235}$ and one alpha per 500 fissions by ${\mathrm{Pu}}^{239}$. The investigation is being continued.