Chronology of Milestone Events in Particle Physics - BECQUEREL 1896C
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.;
Sur Quelques Proprietes Nouvelles des Radiations Invisibles Emises par Divers Corps Phosphorescents / On Several New Properties of Invisible Radiations Emitted by Different Phosphorescent Substances
Compt. Ren. 122 (1896) 559;

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Reprinted in
(translation into English) A. Romer, The discovery of radioactivity and transmutation, Dover, New York 1964.

At one of the last sessions of the Academy, I announced that the invisible radiations emitted by the salts of uranium possessed the property of discharging electrified bodies. I have continued the study of this phenomenon by the use of Hurmuzescu's electroscope, and I have been able to establish, in another way than I have done by photography, that the radiations in question penetrate various opaque substances, in particular, aluminum and copper. Platinum exhibits an absorption considerably greater than that of the two preceding metals. (Extracted from introductory part of the paper.).

Accelerator SOURCE Detectors EMUL

Related references
More (earlier) information appears in
H. Becquerel, Compt. Ren. 122 (1896) 501;

  U unspec X

Particles studied
  unspec ex

Record comments
Confirmation of the effect of spontaneous radioactivity.
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