Chronology of Milestone Events in Particle Physics - PAULI 1925B
Chronology of Milestone Events in Particle Physics

  Nobel prize to W. Pauli awarded in 1945 "for the discovery of the Exclusion Principle, also called the Pauli Principle''  


Pauli, W.;
Über den Zusammenhang des Abschlusses der Elektronengruppen im Atom mit der Komplexstruktur der Spektren / On the Connexion between the Completion of Electron Groups in an Atom with the Complex Structure of Spectra
Z. Phys. 31 (1925) 765;

Reprinted in
(translation into English) The Old Quantum Theory, ed. by D. ter Haar, Pergamon Press (1967) 184.

Especially in connection with Millikan and Landé's observation that the alkali doublets can be represented by relativistic formulae and with results obtained in an earlier paper, it is suggested that this doublets and its anomalous Zeeman effect expresses a classically non-discribable two-valuedness of the quantum theoretical properties of the optically active electrons, without any participation of the closed rare gas configuration of the atom core in the form of a core angular momentum or as the seat of the magneto-mechanical anomaly of the atom. We then attempt to pursue this point of view, taken as a temporary working hypothesis, as far as possible in its consequences also for atoms other than alcali atoms, notwithstanding its difficulties from the point of view of principle. First of all it turns out that it is possible, in contrast to the usual ideas, to assign for the case of a strong external magnetic field, which is so strong that we can neglect the coupling between the atomic core and the optically active electrons, to those two systems, as far as the number of their stationary states, the values of their quantum numbers, and their magnetic energy is conserned, no other properties than those of the free atomic core of the optically active electrons of the alcalis. On the basis of these results one is also led to a general classification of every electron in the atom by the principal quantum number n and two auxiliary quantum numbers k1 and k2 to which is added a further quantum number m1 in the presence of an external field. In conjunction with a recent paper by E. C. Stoner this classification leads to a general quantum theoretical formulation of the completion of electron groups in atoms.

Related references
More (earlier) information appears in
W. Pauli, Z. Phys. 31 (1925) 373;
See also
J. J. Hopfield, Ap.J. 58, 114 (1924);
N. Bohr, Annalen der Physik. Leipzig 71 (1923) 228;
W. Heisenberg and A. Landé, Z. Phys. 25 (1924) 279;
N. Bohr, Drei Aufsätze über Spektren und Atombau, Brunswick (1924);
O. Laporte, Naturw. 12 (1924) 598;
Analyse data from
W. Grotrian, ZP 18, 169 (1923);
V. Thorsen, Naturw. 11 (1923) 78;
E. C. Stoner, Phil. Mag. 48 (1924) 719;

  atom* atom p

Particles studied
  e qn

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Discovery of the exclusion principle - the Pauli principle.
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