Abstract
FURTHER evidence for the existence of particles with mass between that of the electron and that of the proton is given by Dr. E. J. Williams and E. Pickup. They describe four curved tracks obtained in a Wilson chamber using magnetic fields of 1,000 and 2,200 gauss. The tracks indicatethat the mass of the new particle is nearly 200 times the electronic mass.
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Points from Foregoing Letters. Nature 141, 692 (1938). https://doi.org/10.1038/141692b0
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DOI: https://doi.org/10.1038/141692b0