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Publication Citation: Precision Spectroscopy in He as a Test of QED

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Author(s): S Bergeson; A Balakrishnan; K G. Baldwin; Thomas B. Lucatorto; J P. Marangos; T J. McIlrath; Thomas R. O'Brian; S L. Rolston; Craig J. Sansonetti; J Wen; N Westbrook; C H. Cheng; E E. Eyler;
Title: Precision Spectroscopy in He as a Test of QED
Published: December 01, 1999
Abstract: High resolution laser-based measurements of energy levels have spurred the development and refinement of quantum electrodynamic calculations. We have extended very high resolution laser spectroscopy techniques into the vacuum ultraviolet wavelength region at λ {approximately equal to} 120 nm to determine the Lamb shift in the ground state of He -. The importance of this measurement to high accuracy quantum electrodynamics calculations is discussed. Details of the present measurement and future improvements are presented.
Citation: Physica Scripta
Volume: T83
Keywords: helium;Lamb shift;laser spectroscopy;QED;two-photon transition;VUV
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