Chronology of Milestone Events in Particle Physics - CHAMBERLAIN 1956E
Chronology of Milestone Events in Particle Physics

  Nobel prize to O. Chamberlain and E. Segrè awarded in 1959 "for their discovery of the antiproton''  


Chamberlain, O.; Chupp, W.W.; Goldhaber, G.; Segrè, E.; Wiegand, C.; Amaldi, E.; Baroni, G.; Castagnoli, C.; Franzinetti, C.; Manfredini, A.;
Antiproton Star Observed in Emulsion
Phys. Rev. 101 (1956) 909;

In connection with the antiproton investigation at the Bevatron, we planned and carried out a photographic-emulsion exposure in a magnetically selected beam of negative particles. The magnetic system was identical to the first half (one deflecting magnet and one magnetic lens) of the system used in the antiproton experiment of Chamberlain, Segrè, Wiegand, and Ypsilantis. The selected particles left the copper target in the forward direction with momentum 1.09 BeV/c.
Cosmic-ray events possibly due to antiprotons had been observed previously by Hayward, Cowan, Bridge, Courant, De Staebler, and Rossi, and (in nuclear emulsion) by Amaldi, Castagnoli, Cortini, Franzinetti, and Manfredini. We were hopeful of finding events similar to the last one in our experiment as reported here. (Extracted from the introductory part of the paper.).

Accelerator LBL Detectors EMUL

Related references
Analyse data from
O. Chamberlain, E. Segrè, C. Wiegand, and T. Ypsilantis, Phys. Rev. 100 (1955) 947;
E. Hayward, Phys. Rev. 72 (1947) 937;
E. Amaldi et al., Nuovo Cim. 1 (1955) 492;
H. S. Bridge, H. Courant, H. C. de Staebler, and B. Rossi, Phys. Rev. 95 (1954) 1101;
E. W. Cowan, Phys. Rev. 94 (1954) 161;

  nucleon annihil 1.09 GeV (Plab) cs
  nucleus mult(hadron) X 1.09 GeV (Plab) cs

Record comments
First evidence of annihilation of the antiproton in emulsion.
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