| On 2 December 1942, in a laboratory under the university football stadium, Fermi achieved the first self-sustaining nuclear chain reaction. |
| About half a century later, Robert Hofstadter won the 1961 Nobel Prize in physics for his work verifying that the radius of an atomic nucleus is about one fermi. |
| In order to fuse two hydrogen nuclei together, though, we must force another proton into the hydrogen atom within a distance of 1 fermi from the atom's proton. |
| This approach describes how electrons are influenced by the fields produced by others in the Fermi sea. |
| Once the Chicago synchrocyclotron began operating routinely, Fermi returned to experimentation. |
| It acts between two neutrons, between two protons, or between a neutron and a proton, as long as they are no farther apart than a distance of one fermi. |
