Abstract
MEASUREMENTS of low α-particle intensities are usually carried out by counting ionization impulses produced either in Geiger counters or in ionization chambers connected to an amplifier. The latter method has the advantage of allowing a rough evaluation of the energy of the particles, as the number of ions produced in the chamber is accurately proportional to the energy of the ionizing particle, needing 32 volts for the production of one pair of ions in air. This method has the drawback that it needs rather high amplification.
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References
Broser, I., and Kallmann, H., Z. Naturforsch., 2a, 439 (1947); 2a, 642 (1947). Broser, I., Herforth, L., Kallmann, H., and Martius, U., Z. Naturforsch., 3a, 6 (1948).
Frerichs, R., Naturwiss., 33, 281 (1946).
Kallmann, H., and Warminsky, R., Ann. Phys. (in the press).
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BROSER, I., KALLMANN, H. Measurements of α-Particle Energies with the Crystal Fluorescence Counter. Nature 163, 20–21 (1949). https://doi.org/10.1038/163020b0
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DOI: https://doi.org/10.1038/163020b0
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