<P> Rutherford's research, and work done under him as laboratory director, established the nuclear structure of the atom and the essential nature of radioactive decay as a nuclear process . Rutherford's team, using natural alpha particles, demonstrated induced nuclear transmutation, and later, using protons from an accelerator, demonstrated artificially - induced nuclear reactions and transmutation . He is known as the father of nuclear physics . Rutherford died too early to see Leó Szilárd's idea of controlled nuclear chain reactions come into being . However, a speech of Rutherford's about his artificially - induced transmutation in lithium, printed in 12 September 1933 London paper The Times, was reported by Szilárd to have been his inspiration for thinking of the possibility of a controlled energy - producing nuclear chain reaction . Szilard had this idea while walking in London, on the same day . </P> <P> Rutherford's speech touched on the 1932 work of his students John Cockcroft and Ernest Walton in "splitting" lithium into alpha particles by bombardment with protons from a particle accelerator they had constructed . Rutherford realized that the energy released from the split lithium atoms was enormous, but he also realized that the energy needed for the accelerator, and its essential inefficiency in splitting atoms in this fashion, made the project an impossibility as a practical source of energy (accelerator - induced fission of light elements remains too inefficient to be used in this way, even today). Rutherford's speech in part, read: </P> <P> We might in these processes obtain very much more energy than the proton supplied, but on the average we could not expect to obtain energy in this way . It was a very poor and inefficient way of producing energy, and anyone who looked for a source of power in the transformation of the atoms was talking moonshine . But the subject was scientifically interesting because it gave insight into the atoms . </P> <Dl> <Dt> Scientific discoveries </Dt> </Dl>

Who discovered the nucleus of the atom in 1911