Abstract
RECENTLY, multiple nuclear disintegration 'stars', produced by cosmic radiation, have been investigated by the photographic emulsion technique. Plates coated with 50 µ Ilford B.1 emulsions1 were exposed in aircraft for several hours at 30,000 ft. One of these disintegrations was of particular interest, for whereas all stars previously observed had been initiated by radiation not producing ionizing tracks in the emulsion, the one in question appears to be due to nuclear capture of a charged particle, presumably a slow meson.
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References
Powell, Occhialini, Livesey and Chilton, J. Sci. Instr., 23, 102 (1946). Williams, Proc. Roy. Soc., A, 169, 531 (1938).
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PERKINS, D. Nuclear Disintegration by Meson Capture. Nature 159, 126–127 (1947). https://doi.org/10.1038/159126a0
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DOI: https://doi.org/10.1038/159126a0
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