- Pauli, Wolfgang
died Dec. 15, 1958, Zürich, Switz.Austrian-born U.S. physicist.At the age of 20, he wrote a 200-page encyclopaedia article on the theory of relativity. He taught physics in Zürich (1928–40) and later at the Institute for Advanced Study in Princeton, N.J. In 1924 he proposed that a spin quantum number, +12 or -12, is necessary to specify electron energy states. In 1930 he proposed that the energy and momentum apparently lost when an electron is emitted from an atomic nucleus in beta decay is carried away by an almost massless, uncharged, and difficult-to-detect particle (the neutrino). He was awarded a 1945 Nobel Prize for his 1925 discovery of the Pauli exclusion principle.
* * *▪ American physicistborn April 25, 1900, Vienna, Austriadied Dec. 15, 1958, Zürich, Switz.Austrian-born physicist and recipient of the 1945 Nobel Prize for Physics for his discovery in 1925 of the Pauli exclusion principle, which states that in an atom no two electrons can occupy the same quantum state simultaneously. This principle clearly relates the quantum theory to the observed properties of atoms.When he was 20, Pauli wrote a 200-page encyclopaedia article on the theory of relativity. He was appointed a lecturer at the University of Hamburg in 1923, and the following year he proposed that a fourth quantum number, which may take on the numerical values +1/2 or −1/2, was necessary to specify electron energy states. It was later found that the two values represent the two possible directions of spin for fermions (fermion). In 1925 he introduced his exclusion principle, which immediately made clear the reason for the structure of the periodic table of the elements.In 1928 Pauli became professor of theoretical physics at the Federal Institute of Technology, Zürich. Under his direction the institution became a great centre of research in theoretical physics during the years preceding World War II. In the late 1920s it was observed that when a beta particle (electron) is emitted from an atomic nucleus, there is generally some energy and momentum missing, a grave violation of the laws of conservation. Rather than allow these laws to be discarded, Pauli proposed in 1931 that the missing energy and momentum is carried away from the nucleus by some particle (later named the neutrino by Enrico Fermi (Fermi, Enrico)) that is uncharged and has little or no mass and had gone unnoticed because it interacts with matter so seldom that it is nearly impossible to detect. This particle was not observed until 1956.In 1940 Pauli was appointed to the chair of theoretical physics at the Institute for Advanced Study, Princeton, New Jersey, and in 1946 he became a naturalized citizen of the United States. Following World War II he returned to Zürich.
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PAULI, WOLFGANG — (1900–1958), Swiss physicist and Nobel laureate born in Vienna. His father was a physician born in Prague, who changed the family name from Pascheles to Pauli, and his mother, a writer, was born in Vienna. He was educated at the Doebling… … Encyclopedia of Judaism
Pauli , Wolfgang — (1900–1958) Austrian–Swiss physicist Born in the Austrian capital of Vienna, Pauli was the son of a professor of physical chemistry at the university there and the godson of Ernst Mach. He was educated at the University of Munich, where he… … Scientists
Pauli, Wolfgang — (1900 1958) physicist; discovered the exclusion prin ciple, according to which no two electrons can be described as having the same energy state. The son of a chemistry professor at Vienna, he comprehended Albert Einstein s* relativity theory… … Historical dictionary of Weimar Republik
Pauli, Wolfgang — ► (1900 58) Físico austríaco. Fue premio Nobel de Física en 1945. Se le debe la predicción del neutrino a partir del estudio de las anomalías en la emisión de partículas beta. * * * (25 abr. 1900, Viena, Austria–15 dic. 1958, Zurich, Suiza).… … Enciclopedia Universal
Pauli,Wolfgang — Pau·li (pouʹlē), Wolfgang. 1900 1958. Austrian born American physicist. He won a 1945 Nobel Prize for work on atomic fissions. * * * … Universalium
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Pauli, Wolfgang — (1900–1958) Austrian born physicist, awarded Nobel Prize for Physics (1945) … Bryson’s dictionary for writers and editors
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Wolfgang Ernst Pauli — Cet article fait partie de la série Mécanique quantique Postulats de la mécanique quantique Histoire de … Wikipédia en Français