Bubble Counting for the Determination of the Velocities of Charged Particles in Bubble Chambers

Phys. Rev. 102, 1653 – Published 15 June 1956
Donald A. Glaser, David C. Rahm, and Cyril Dodd


The density of bubbles along tracks in a liquid propane bubble chamber has been measured as a function of particle velocity for positive pions and protons with velocities β=vc>0.4. For temperatures from 55°C to 59.5°C the bubble density, b, is described by b=(Aβ2)+B(T), where A=9.2±0.2 bubbles/cm and B is a function of temperature only. Velocities can be determined by bubble counting, using fast comparison tracks of known velocity, with a final average error in velocity of 5% for proton tracks 10 cm long. Accurate temperature control is not required to obtain this accuracy by using this method.

DOI: http://dx.doi.org/10.1103/PhysRev.102.1653

  • Received 23 February 1956
  • Published in the issue dated June 1956

© 1956 The American Physical Society

Authors & Affiliations

Donald A. Glaser

  • Harrison M. Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan

David C. Rahm

  • Brookhaven National Laboratory, Upton, New York

Cyril Dodd*

  • Physics Department, University College, London, England

  • *Fulbright Research Scholar, University of Michigan, Fall, 1955.

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