Chronology of Milestone Events in Particle Physics - BECQUEREL 1896F
Chronology of Milestone Events in Particle Physics

  Nobel prize to H. Becquerel awarded in 1903 "for his discovery of spontaneous radioactivity''. Co-winners M. Curie and P. Curie "for their joint researches on the radiation phenomena discovered by Becquerel''  


Becquerel, H.;
Emission de Radiations Nouvelles par l'Uranium Metallique / Emission of New Radiation by Metallic Uranium
Compt. Ren. 122 (1896) 1086;

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Reprinted in
(translation into English) A. Romer, The discovery of radioactivity and transmutation, Dover, New York (1964) 19.
(translation into English) The WORLD of the ATOM, editors H. A. Boorse and L. Motz, Basic Books, New York - London, V.I (1966) 406.

All the salts of uranium I have studied, whether phosphorescent or not with respect to light, crystallized, fused, or in solution, have given comparable results. Thus I have been led to think that the effect was due to the presence in these salts of the element uranium, and that the metal would give more intense effects than its compounds would.
A few weeks ago an experiment with a commercial powder of uranium which had long been in my laboratory confirmed this prediction; the photographic effect is notably stronger than the impression produced by one of the salts of uranium, and, in particular, by uranium-potassium sulfate. (Extracted from the introductory part of the paper.).

Accelerator SOURCE Detectors EMUL

Related references
See also
H. Becquerel, Compt. Ren. 122 (1896) 501;
H. Becquerel, Compt. Ren. 122 (1896) 762;
H. Becquerel, Compt. Ren. 122 (1896) 689;
H. Becquerel, Compt. Ren. 122 (1896) 559;

  U unspec X

Particles studied
  unspec ex

Record comments
Uranium radioactivity established.
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