premise: It is the diametrically opposite process of nuclear fission, in which an atom of the heavy isotope Uranium-238 is split in a collision with an accelerated neutron, releasing some of the energy from inside the atom.
hypothesis: A neutron collides with an atom of u-235 during the basic nuclear fission process.
hypothesis_graph_structure: A neutron<>collides<>with an atom of u-235 during the basic nuclear fission process