Chronology of Milestone Events in Particle Physics - FERMI 1934
Chronology of Milestone Events in Particle Physics

FERMI 1934

Fermi, E.;
Versuch einer Theorie der -Strahlen.I / Towards the Theory of -Rays
Z. Phys. 88 (1934) 161; Nuovo Cim. 11 (1934) 1;

Reprinted in
Enrico Fermi. Collected Papers (Note e Memorie) v.I. Italy 1921 - 1938 (1962). The University of Chicago Press - Accademia Nazionale dei Lincei, Roma.
(translation into Russian) Enrico Fermi. Nauchnye Trudy. I. 1921-1938 Italiya. (pod red. B.Pontecorvo), Nauka, Moskva, 1971, str. 525.
(translation into English) In The Development of Weak Interaction Theory, editor P. K. Kabir, Gordon and Breach Science Publishers, New York - London, (1963) 1.

Eine quantitative Theorie des -Zerfalls wird vorgeschlagen, in welcher man die Existenz des Neutrinos annimmt, und die Emission der Elektronen und Neutrinos aus einem Kern beim -Zerfall mit einer ähnlichen Methode behandelt, wie die Emission eines Licht-quants aus einem angeregten Atom in der Strahlungstheorie. Formeln für die Lebensdauer und für die Form des emittierten kontinuierlichen -Strahlenspektrums werden abgeleitet und mit der Erfahrung verglichen.
Abstract A quantitative theory of the emission of -rays is explained. This admits the existence of the "neutrino,'' a new particle proposed by Pauli having no electric charge and mass of the order of magnitude of that of the electron or less. The emission of the electrons and of the neutrinos from a nucleus on the occasion of the -disintegration is treated by a method similar to that followed in the theory of radiation to describe the emission of a quantum of light from an excited atom. Formulae are deduced for the mean life and for the form of the continuous spectrum of the -rays and these are compared with experimental data. (Science Abstracts. 1934. 1547. J.J.S.).

Related references
More (earlier) information appears in
E. Fermi, La Ricerca Scientifica IV-II (1933) 491;
E. Fermi, Nuovo Cim. 11 (1934) 1;
E. Fermi, Rev. of Mod. Phys. 4 (1932) 87;
See also
W. Heisenberg, Z. Phys. 77 (1932) 1;
W. Heisenberg, Annalen der Physik. Leipzig 10 (1931) 888;
R. H. Hulme, Proc. Roy. Soc. A133 (1931) 381;
P. Jordan and O. Klein, Z. Phys. 45 (1927) 751;
F. Perrin, Compt. Ren. 197 (1933) 1625;
Analyse data from
B. W. Sargent, Proc. Roy. Soc. A139 (1933) 659;
B. W. Sargent, Proc. Camb. Phil. Soc. 28 (1932) 538;

  nucleus nucleus e e p
  n p e e p

Particles studied
  e ex, mass, qn

Record comments
Field theory for beta decay. First estimation of the neutrino mass.
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