Positronium: Precision determination of the ground-state fine-structure interval Δv,and measurement of density shifts in the noble gases |
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| Authors: | P.O. Egan W.E. Frieze V.W. Hughes M.H. Yam |
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| Affiliation: | J.W. Gibbs Laboratory, Physics Department, Yale University, New Haven, Ct. 06520, USA |
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| Abstract: | The positronium n = 1 fine-structure interval, Δv, has been measured in nitrogen yielding Δv = 203.3849(12) GHz. Comparison with theory shows the need to calculate higher-order theoretical terms. The positronium density shifts in the noble gases were also measured. |
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