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APS » Journals » Phys. Rev. Lett. » Volume 82 » Issue 21
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Phys. Rev. Lett. 82, 4200–4203 (1999)

Precision Measurement of the 1s2p 3P2-3P1 Fine Structure Interval in Heliumlike Fluorine

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E. G. Myers1, H. S. Margolis2,*, J. K. Thompson1,†, M. A. Farmer1, J. D. Silver2, and M. R. Tarbutt2
1Department of Physics, Florida State University, Tallahassee, Florida 32306-4350
2Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom

Received 23 November 1998; published in the issue dated 24 May 1999

Using Doppler-tuned fast-beam laser spectroscopy with co- and counterpropagating beams we have measured the three hyperfine components of the 1s2p3P2-3P1 fine structure interval in 19F7+. Our result for the centroid is 957.6679(10)cm-1. Allowing for the hyperfine interaction the “pure” fine structure interval is determined to be 957.8730(12)cm-1. This result tests O(α7mec2) quantum electrodynamic corrections to high precision calculations which will be used to obtain a new value for the fine structure constant from the fine structure of helium.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.4200
DOI:
10.1103/PhysRevLett.82.4200
PACS:
32.10.Fn, 06.20.Jr

*Present address: Centre for Length Metrology, National Physical Laboratory, Teddington, TW11 0LW, United Kingdom.

†Present address: Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139.

 
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