Optically excited states in positronium

Details Optically excited states in positronium Optically excited states in positronium

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3058..201h&link_type=abstract

In NASA, Goddard Space Flight Center, Annihilation in Gases and Galaxies, NASA CP-3058 p 201-207 (SEE N90-18957 11-70)

Physics

Annihilation Reactions, Atomic Excitations, Particle Beams, Particle Production, Positronium, Dye Lasers, Laser Beams, Optical Pumping, Pulsed Lasers, Transition Probabilities

Scientific paper

Optical excitation are reported of the 1 3S-2 3P transition in positronium, and a second excitation from n=2 to higher n states. The experiment used light from two pulsed dye lasers. Changes in the positronium annihilation rate during and after the laser pulse were used to deduce the excited state populations. The n=2 level was found to be saturable and excitable to a substantial fraction of n=2 positronium to higher levels. Preliminary spectroscopic measurements were performed on n=14 and n=15 positronium.

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