Discovering the positron
  1. Dirac's equation predicts antiparticles

    In 1928, British physicist Paul Dirac wrote down…

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  2. First sighting of positron disregarded

    While studying cosmic rays in a Wilson cloud…

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  3. Paul Dirac predicts the positron

    Paul Dirac published a paper mathematically…

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  4. Results confirmed

      The discovery was confirmed soon after by…

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  5. The beginning of Positron Emission Tomography

    William H. Sweet and Gordon L. Brownell at…

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