Abstract
SINCE Skobelzyn1 discovered the tracks of particles of high energy on photographs taken with a Wilson cloud chamber, this method has been used by him and others in a number of investigations2 of the nature of penetrating radiation. Such work is laborious, since these tracks occur in only a small fraction of the total number of expansions made. We have found it possible to obtain good photographs of these high energy particles by arranging that the simultaneous discharge of two Geiger-Müller counters due to the passage of one of these particles shall operate the expansion itself. On more than 75 per cent of the photographs so obtained (the fraction depending on the ratio of the number of ‘true’ to ‘accidental’ coincidences) are found the tracks of particles of high energy.
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References
Skobelzyn, Z. Phys., 54, 686; 1929.
Skobelzyn, Comptes rendus, 194, 118; 1932. Auger and Skobelzyn, Comptes rendus, 189, 55; 1929. Millikan and Anderson, Phys. Rev., 40, 325; 1932
Mott Smith and Locher, Phys. Rev., 38, 1399; 1931: 39, 883; 1932.
Johnson, Fleicher, and Street, Phys. Rev., 40, 1048; 1932.
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BLACKETT, P., OCCHIALINI, G. Photography of Penetrating Corpuscular Radiation. Nature 130, 363 (1932). https://doi.org/10.1038/130363a0
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DOI: https://doi.org/10.1038/130363a0
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