Excitation of the Positronium 13S1 - 23S1 Two Photon Transition

  • Allen P. MillsJr.
  • Steven Chu
Conference paper


We report here the details of the first experiment to excite optically Ps from the n=1 triplet ground state to the 23S1 state[1]. The accuracy of our measurement of the 23S1 - 13S1 interval is approximately 0.8 ppm. Since the experiment was done with thermal positronium in vacuum, straightforward extension of the now proven technology should allow us to improve the accuracy of this measurement by several orders of magnitude.


Discharge Tube Stark Shift Drift Region Photon Transition Natural Linewidth 


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Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • Allen P. MillsJr.
    • 1
  • Steven Chu
    • 1
  1. 1.Bell LaboratoriesMurray HillUSA

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