View source for Enrico Fermi

{{Infobox person
| name = Enrico Fermi
| born = 29 September 1901
| died = 28 November 1954
| nationality = Italian-born; later American
| occupation = Physicist
| known_for = Nuclear physics; statistical mechanics; first nuclear reactor
| notable_work = Fermi–Dirac statistics; work on neutron-induced radioactivity
}}


'''Enrico Fermi''' (29 September 1901 – 28 November 1954) was a physicist whose work addressed nuclear processes, particle behavior, and statistical methods in physics. He examined how fundamental particles behave under quantum and thermodynamic constraints and how nuclear reactions can be controlled.

His work combined theoretical modeling with experimental practice.

== Early life and education ==
Fermi was born in Rome, Italy. He studied physics at the University of Pisa, where he completed doctoral work at a young age.

His early research focused on mathematical physics and emerging quantum theory.

== Statistical mechanics ==
Fermi developed a statistical description of particles that obey what later became known as Fermi–Dirac statistics. This framework applies to particles with half-integer spin and explains properties of electrons in solids.

The approach became foundational in condensed matter physics.

== Nuclear physics ==
Fermi conducted experiments on neutron-induced radioactivity, demonstrating how slow neutrons can increase the probability of nuclear reactions. His work contributed to understanding nuclear fission and reaction chains.

These results opened paths to both theoretical and applied nuclear research.

== First nuclear reactor ==
Fermi led the team that achieved the first controlled, self-sustaining nuclear chain reaction in 1942. The experiment demonstrated that nuclear energy could be released in a regulated manner.

This work marked a transition from laboratory research to large-scale nuclear engineering.

== Relationship to institutions ==
Fermi held academic positions in Italy before emigrating to the United States in the late 1930s. He worked at the University of Chicago and in government-sponsored research during World War II.

He trained students and collaborated widely across physics subfields.

== Limits and uncertainty ==
Early nuclear research involved uncertainties about safety and long-term consequences. Some theoretical assumptions were revised as nuclear physics developed.

Interpretations of Fermi’s role vary between his theoretical and applied contributions.

== Status ==
Enrico Fermi is regarded as a central figure in twentieth-century physics. His work continues to be discussed in nuclear physics, statistical mechanics, and the history of science.

== Related topics ==

[[Nuclear physics]]

[[Statistical mechanics]]

[[Fermi–Dirac statistics]]

[[Nuclear reactor]]

[[Category:Physicists]]
[[Category:Italian physicists]]
[[Category:American physicists]]
[[Category:20th-century physics]]