Phys. Rev. A 16, 6–18 (1977)Hyperfine structure of the 2s state of 3He+Received 2 February 1977; published in the issue dated July 1977 Using an electrostatic ion-storage device and a microwave state-selection technique, we have measured the hyperfine structure Δν2 of the 2s state of 3He+. Our result is Δν2=1083.3549807(88) MHz (the equivalent uncertainty is 0.009 ppm). When combined with the 1s-state hyperfine structure Δν1 to make the quantity D21≡8Δν2-Δν1, we obtain D21(experiment)=1.189979(71) MHz. Current theory produces D21(theory)=1.189801(1) MHz. The 178(71) Hz difference may arise from a combination of quantum-electrodynamic and nuclear structure effects which remain to be treated theoretically. © 1977 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.16.6
DOI:
10.1103/PhysRevA.16.6
PACS:
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