25th anniversary of death - Austria / II. Republic of Austria 1983 - 6 Shilling

Wolfgang Ernst Pauli was born on April 25, 1900 in Vienna. After graduation, he enrolled in physics at the age of 18 at the University of Munich and graduated after only three years in 1921. Between the ages of 23 and 28 he had his most fertile scientific time. He was fortunate that just in these years, physics made a big leap forward by finding quantum mechanics and wave-particle equivalence (correspondence). He himself had a decisive part in this with the discovery of the exclusion principle named after him. By this "Pauli principle," as it was called, he had found an ingenious explanation of the periodic system of chemical elements. He claimed that apparently in an atom no electrons agree in all quantum numbers, not even in the spin quantum number. With the "Pauli Principle", a thought-experiment was then able to construct a single atom from the previous one in the periodic table, thus understanding the atomistic structure of all 92 elements known at that time. Crucially, there were only two possible values ​​for the spin quantum number. In 1945 he was awarded the Nobel Prize in Physics for the discovery of the exclusion principle in quantum mechanics named after him. He died on 15 December 1958 in Zurich.