Abstract
THE accompanying photograph shows an event observed in an N.T.4 plate exposed for several hours at an altitude of some 90,000 ft. in balloon flights made recently at Bangalore. The heavier track enters the emulsion from the air, and gives rise to the lighter track after a path of 535 µ. The lighter track has a range of 571 µ and ends in the emulsion. The event can be identified with confidence as an example of π—µ decay. The grain densities are also consistent with this explanation.
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LAL, D., TAYLOR, H. An Unusual π—µ Decay Track. Nature 166, 607 (1950). https://doi.org/10.1038/166607b0
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DOI: https://doi.org/10.1038/166607b0
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