Chronology of Milestone Events in Particle Physics - BLACKETT 1932
Chronology of Milestone Events in Particle Physics

  Nobel prize to P. M. S. Blackett awarded in 1948 "for his development of the Wilson cloud chamber method and his discoveries therewith in the field of nuclear physics and cosmic radiation''  


Blackett, P.M.S.; Occhialini, G.P.S.;
Photography of Penetrating Corpuscular Radiation
Nature 130 (1932) 363;

Since Skobelzyn (Skobelzyn, Z. Phys. 54 (1929) 686) discovered the tracks of particles of high energy on photographs taken with a Wilson cloud chamber, this method has been used by him and others in a number of investigations (Skobelzyn, Comptes rendus 194 (1932) 118) of the nature of penetrating radiation. Such work is laborious, since these tracks occur in only a small fraction of the total number of expansions made. We have found it possible to obtain good photographs of these high energy particles by arranging that the simultaneous discharge of two Geiger-Müller counters due to the passage of one of these particles shall operate the expansion itself. (Extracted from the introductory part of the paper.).

Accelerator COSM Detectors CLOUD

Related references
Analyse data from
D. V. Skobelzyn, Z. Phys. 54 (1929) 686;
T. H. Johnson, W. Fleisher, and J. C. Street, Phys. Rev. 40 (1932) 1048;
R. A. Millikan and C. D. Anderson, Phys. Rev. 40 (1932) 325;
D. V. Skobelzyn, Compt. Ren. 194 (1932) 118;

  charged 2-20 MeV (Plab) flux

Particles studied
  charged ex, mass, qn

Record comments
Confirmation of fast penetrating charged particles in cosmic rays.
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