Positronium reveals its first excited state
MAY 01, 1975
DOI: 10.1063/1.3068960
The way has been paved to test quantum electrodynamical predictions of the Lamb‐shift‐like transitions in positronium. Karl F. Canter, Allen P. Mills Jr and Stephan Berko of Brandeis University recently observed1 the long‐sought radiation from the first excited state of positronium with a method that makes it feasible to measure the fine structure of the
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© 1975 American Institute of Physics
