Léon Rosenfeld
Encyclopedia
Léon Rosenfeld was a Belgian
Belgium
Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

 physicist
Physicist
A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...

. He obtained a PhD at the University of Liège
University of Liège
The University of Liège , in Liège, Wallonia, Belgium, is a major public university in the French Community of Belgium. Its official language is French.-History:...

 in 1926, and he was a collaborator of the physicist Niels Bohr
Niels Bohr
Niels Henrik David Bohr was a Danish physicist who made foundational contributions to understanding atomic structure and quantum mechanics, for which he received the Nobel Prize in Physics in 1922. Bohr mentored and collaborated with many of the top physicists of the century at his institute in...

. He did early work in quantum electrodynamics that predates by two decades the work by Dirac and Bergmann. He coined the name lepton
Lepton
A lepton is an elementary particle and a fundamental constituent of matter. The best known of all leptons is the electron which governs nearly all of chemistry as it is found in atoms and is directly tied to all chemical properties. Two main classes of leptons exist: charged leptons , and neutral...

. In 1949 Léon Rosenfeld was awarded the Francqui Prize
Francqui Prize
The Francqui Prize is a prestigious Belgian scholarly and scientific prize, awarded each year since 1933 by the Francqui Foundation in recognition of the achievements of a young Belgian scholar or scientist...

for Exact Sciences.
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