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 . For temperatures from 55°C to 59.5°C the bubble density, , is described by , where bubbles/cm and 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.
- Received 23 February 1956
- Published in the issue dated June 1956
© 1956 The American Physical Society