Hans Bethe


Hans Albrecht Bethe

Photo from the Nobel Foundation archive.

Hans Albrecht Bethe
The Nobel Prize in Physics 1967

Born: 2 July 1906, Strasbourg, Germany (now France)

Died: 6 March 2005, Ithaca, NY, USA

Affiliation at the time of the award: Cornell University, Ithaca, NY, USA

Prize motivation: “for his contributions to the theory of nuclear reactions, especially his discoveries concerning the energy production in stars”

Prize share: 1/1


Hans Bethe was born in Strasbourg and studied in Frankfurt and Munich. When the Nazis took power in 1933, Bethe was dismissed from his post in Tübingen and emigrated via England to the U.S. He became a professor at Cornell University in Ithaca, New York, where he stayed for the rest of his career. During World War II, he took part in developing the atomic bomb and introductory work on the hydrogen bomb, but he subsequently opposed nuclear weapons. In 1939 he married Rose Ewald, with whom he had one son and one daughter.


The discovery of fission—the splitting of heavy nuclei—revealed the liberation of large quantities of energy; an effect now exploited in nuclear reactors. This energy is generated by differences in mass. Energy is also liberated when light nuclei combine to form heavier ones, i.e. fusion. In 1938, Hans Bethe proved that fusion produces the enormous energy emitted by stars. He proposed two different processes, both of which result in hydrogen nuclei fusing with helium nuclei.

To cite this section
MLA style: Hans Bethe – Facts. NobelPrize.org. Nobel Prize Outreach AB 2023. Mon. 29 May 2023. <https://www.nobelprize.org/prizes/physics/1967/bethe/facts/>

Back to top Back To Top Takes users back to the top of the page

Nobel Prizes and laureates

Fourteen laureates were awarded a Nobel Prize in 2022, for achievements that have conferred the greatest benefit to humankind. Their work and discoveries range from paleogenomics and click chemistry to documenting war crimes.

See them all presented here.
Nobel Prizes 2022

Explore prizes and laureates

Look for popular awards and laureates in different fields, and discover the history of the Nobel Prize.