A heavy liquid bubble chamber with a useful volume of 100×50×50 cm operating in a magnetic field of 20 000 gauss is described. Engineering details are given. Lateral illumination of the liquid and scattering of light at 90° is used to photograph the tracks. Different mixtures of Freon (CF3Br) and propane have been used in the chamber allowing a choice of radiation length and stopping power particularly suitable to the experiment performed.
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Bloch et al. (1961) studied this question.