what did heisenberg say about electrons?
wolfgang ernst pauli worked with werner karl heisenberg
contradiction
 But it was Bohr who electrified the audience with his news from Europe of the discovery by Lise Meitner and Otto Frisch of nuclear fission . Physicists rushed to confirm the results . Creutz built an ionization chamber and a linear amplifier out of radio vacuum tubes , coffee cans and motorcycle batteries , and with this apparatus the physicists at Princeton were able to confirm the results . 

contradiction
 In the fall of 1931 , Fermi and Orso Mario Corbino organized in Rome an international conference on nuclear physics , which was sponsored by the Royal Academy of Italy . Fermi invited Rossi to give an introductory talk on cosmic rays . In the audience were Robert Millikan and Arthur Compton , both of whom had won the Nobel prize in physics , in 1923 and 1927 , respectively . During the 1920s , Millikan , who is famous for his oil drop experiment , made extensive measurements of the mysterious radiation discovered by Hess . He coined the name " cosmic rays " and proposed that they were photons created by the fusion of hydrogen in interstellar space . He was not pleased by the presentation of evidence that most observed cosmic rays are energetic charged particles . Later , Rossi wrote : 

contradiction
 A team led by Enrico Fermi in 1934 observed that bombarding uranium with neutrons produces the emission of beta rays ( electrons or positrons from the elements produced ; see beta particle ) . The fission products were at first mistaken for new elements of atomic numbers 93 and 94 , which the Dean of the Faculty of Rome , Orso Mario Corbino , christened ausonium and hesperium , respectively . The experiments leading to the discovery of uranium 's ability to fission ( break apart ) into lighter elements and release binding energy were conducted by Otto Hahn and Fritz Strassmann in Hahn 's laboratory in Berlin . Lise Meitner and her nephew , the physicist Otto Robert Frisch , published the physical explanation in February 1939 and named the process " nuclear fission " . Soon after , Fermi hypothesized that the fission of uranium might release enough neutrons to sustain a fission reaction . Confirmation of this hypothesis came in 1939 , and later work found that on average about 2 @.@ 5 neutrons are released by each fission of the rare uranium isotope uranium @-@ 235 . Further work found that the far more common uranium @-@ 238 isotope can be transmuted into plutonium , which , like uranium @-@ 235 , is also fissile by thermal neutrons . These discoveries led numerous countries to begin working on the development of nuclear weapons and nuclear power . 

contradiction
 While writing the appendix for the Italian edition of the book Fundamentals of Einstein Relativity by August Kopff in 1923 , Fermi was the first to point out that hidden inside the famous Einstein equation ( E = mc2 ) was an enormous amount of nuclear potential energy to be exploited . " It does not seem possible , at least in the near future " , he wrote , " to find a way to release these dreadful amounts of energy — which is all to the good because the first effect of an explosion of such a dreadful amount of energy would be to smash into smithereens the physicist who had the misfortune to find a way to do it . " 

contradiction
 At the same time , investigations of blackbody radiation carried out over four decades ( 1860 – 1900 ) by various researchers culminated in Max Planck 's hypothesis that the energy of any system that absorbs or emits electromagnetic radiation of frequency ν is an integer multiple of an energy quantum E 
