Abstract
I. CURIE-JOLIOT, Anderson and Neddermeyer, Meitner and Philipp have been able to observe positive electrons produced by the hard γrays of thorium C″ in lead and other elements. An attempt to explain the phenomenon has been made by Oppenheimer and Plesset, who consider it as a kind of photo-effect from the levels of negative energy, the absorption of a quantum of light energy resulting in the formation of two material particles, a negative and a positive electron. A pair of these electrons, formed in the gas of a Wilson chamber, is to be seen on one of the photographs published by Curie-Joliot1.
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References
I. Curie and F. Joliot, J. Phys., 4, 429 ; 1933.
C. D. Ellis, Proc. Roy. Soc., A, 138, 318 ; 1932.
J. R. Oppenheimer and M. S. Plesset, Phys. Rev., 44, 53 ; 1933.
W. H. Furry and J. F.Carlson, Phys. Rev., 44, 237 ; 1933.
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SKOBELTZYN, D. Positive Electron Tracks. Nature 133, 23–24 (1934). https://doi.org/10.1038/133023a0
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DOI: https://doi.org/10.1038/133023a0
