Authors:J. Aaltonen, M. Haaparanta, M. Kulha, and O. Taivainen
The reaction U(3He, xn)Pu was studied by irradiating enriched235U (50.3%) and enriched238U (99.7%) targets with3He ions at the Åbo Akademi cyclotron (Turku, Finland). The incident3He ion energy in the irradiations was 27.0, 24.5 and 21.9 MeV. Plutonium was separated from the thin uranium targets by ion
exchange. From the ion exchange fractions obtained, plutonium was electrodeposited on steel plates for alpha and X-ray counting.
The activity of237Pu in the steel plates was determined with a Ge(Li) detector and the activity of236Pu and238Pu with a Si surface barrier detector. The cross sections of the reactions and the yields of plutonium isotopes are given.
Authors:J. Aaltonen, V. Dmitriev, E. Gromova, S. Heselius, and V. Jakovlev
The cross sections for the3He induced nuclear reactions on237Np leading to the formation of236sNp,238Np,236Pu,237Pu,238Pu,237Am and239Am were studied by the irradiation of thin and thick targets of237Np. The cross sections were determined in the energy range of 20–26 MeV using the stacked-foil technique with thin targets. The cross sections were used for the calculation of the thick-target yields for the production of236Pu,237Pu and238Pu from237Np irradiated with3He2+ ions in the energy range of 20–26 MeV.