Precision measurement of relativistic and QED effects in heliumlike beryllium

T. J. Scholl, R. Cameron, S. D. Rosner, L. Zhang, R. A. Holt, Craig J. Sansonetti, and J. D. Gillaspy
Phys. Rev. Lett. 71, 2188 – Published 4 October 1993
PDFExport Citation

Abstract

We have used fast-ion-beam laser spectroscopy to measure the 1s2s3s-1s2p3Po intervals in Be iii to an absolute accuracy of 1 part in 108. Our results are (in cm1): σ(1s2s3S1-1s2p3P0o=28 864.6120(4), σ(1s2s3S11s2p3P1o=26 853.0534(3), σ(1s2s3S11s2p3P2o) =26 867.9484(3). These results are an improvement over previous measurements by nearly 3 orders of magnitude and show evidence of uncalculated O(α4Z4) relativistic corrections. Once those terms are computed, our measurement will allow QED calculations in two-electron atoms to be tested at the 100 ppm level.

  • Received 25 May 1993

DOI:https://doi.org/10.1103/PhysRevLett.71.2188

©1993 American Physical Society

Authors & Affiliations

T. J. Scholl, R. Cameron, S. D. Rosner, L. Zhang, and R. A. Holt

  • Department of Physics, University of Western Ontario, London, Ontario, Canada N6A 3K7

Craig J. Sansonetti and J. D. Gillaspy

  • National Institute of Standards and Technology, Gaithersburg, Maryland 20899

References (Subscription Required)

Click to Expand
Issue

Vol. 71, Iss. 14 — 4 October 1993

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×