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Measurement of the Lamb shifts in singlet levels of atomic helium

W. Lichten, D. Shiner, and Zhi-Xiang Zhou

  • Department of Physics, Yale University, Box 6666, New Haven, Connecticut 06511-8167

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Phys. Rev. A 43, 1663(R) – Published 1 February, 1991Erratum Phys. Rev. A 45, 8295 (1992)

DOI: https://doi.org/10.1103/PhysRevA.43.1663

Abstract

We report laser spectroscopic results that extend the precision of earlier measurements substantially and provide tests of recent calculations on the singlet S, P, and D levels of atomic helium. We have determined the Lamb shift of the He 21S0, 3 1P1 states by unambiguously establishing the 2 1S0 absolute level position, by Doppler-free, two-photon transitions from 2 1S0 to n1D2 (7≤n≤20). The Lamb shift of 0.093 761(5) cm−1 [2810.88(15) MHz] agrees with a less precise experiment of Sansonetti, Gillaspy, and Cromer [Phys. Rev. Lett. 65, 2539 (1990)], but differs from theory by 98.36(15) MHz. In combination with the above-noted experimental result, the Lamb shift of the 3 1P1 level is 0.000 522(45) cm−1, in agreement with theory. Our relative spacings of the D levels is in disagreement with published theoretical calculations, but is in agreement with recent unpublished corrections of this work. This D-level agreement also confirms Casimir forces to the 2% level.

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Erratum

Erratum: Measurement of the Lamb shifts in singlet levels of atomic helium

W. Lichten, D. Shiner, and Zhi-Xiang Zhou
Phys. Rev. A 45, 8295 (1992)

Comments & Replies

Comment on ‘‘Measurement of the Lamb shifts in singlet levels of atomic helium’’

J. D. Gillaspy and W. C. Martin
Phys. Rev. A 45, 5315 (1992)

References (12)

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Outline

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Phys. Rev. A 43, 1663(R)– Published 1 February, 1991
  • Received 26 September 1990

© 1991 American Physical Society

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