CLAUS LUNAU / SCIENCE PHOTO LIBRARY CLAUS LUNAU / SCIENCE PHOTO LIBRARY
Nuclear fission reaction, computer artwork. At left is a neutron (blue) about to collide with an uranium-235 nucleus (grey). Upon collision the neutron combines with the nucleus to form uranium- 236. This is a highly unstable element that spontaneously undergoes nuclear fission (splitting), producing a vast amount of energy (seen here as a blue and green explosion), the elements barium-141, krypton-92 and three neutrons. This is the reaction that occurred in the atomic bombs dropped by the Americans on the Japanese cities of Hiroshima and Nagasaki during World War Two.
Model release not required. Property release not required.