Precision determination of the hyperfine-structure interval in the ground state of positronium. V

M. W. Ritter; P. O. Egan; V. W. Hughes; K. A. Woodle

doi:10.1103/PhysRevA.30.1331

Precision determination of the hyperfine-structure interval in the ground state of positronium. V

M. W. Ritter, P. O. Egan, V. W. Hughes, and K. A. Woodle

Phys. Rev. A 30, 1331 – Published 1 September 1984

Abstract

We report a new, more precise determination of the ground-state hyperfine-structure interval $Δ ν$ in positronium, which is based on extensive new data at low $N_{2}$ -gas densities combined with previous data from our group at Yale University. Our experimental value $Δ ν = 203.389 10 (74)$ GHz (3.6 ppm) agrees with the current theoretical value $Δ ν = 203.400$ GHz, for which the estimated uncertainty is about 50 ppm.

Received 5 March 1984

DOI:https://doi.org/10.1103/PhysRevA.30.1331

Authors & Affiliations

M. W. Ritter^*, P. O. Egan^†, V. W. Hughes, and K. A. Woodle

Gibbs Laboratory, Yale University, New Haven, Connecticut 06520

^*Present address: High Energy Physics Laboratory, Stanford University, Stanford, CA 94305.
^†Present address: Lawrence Livermore National Laboratory, Livermore, CA 94550.

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Vol. 30, Iss. 3 — September 1984

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