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Phys. Rev. Lett. 97, 013002 (2006) [4 pages]

Improved Theory of Helium Fine Structure

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Krzysztof Pachucki
Institute of Theoretical Physics, Warsaw University, Hoa 69, 00-681 Warsaw, Poland

Received 22 February 2006; published 5 July 2006

Improvedtheoretical predictions for the fine-structure splitting of 2³P_J levels inhelium are obtained by the calculation of contributions of order alpha ⁵ Ry. New results for transition frequencies ₀₁=29 616 943.01(17) kHz and ₁₂=2 291 161.13(30) kHz disagreesignificantly with the experimental values, indicating an outstanding problem inbound state QED.

©2006 The American Physical Society

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.97.013002
DOI:	10.1103/PhysRevLett.97.013002
PACS:	31.30.Jv; 12.20.Ds; 31.15.-p 31.30.Jv Relativistic and quantum electrodynamic effects in atoms and molecules 12.20.Ds Specific calculations in quantum electrodynamics 31.15.-p Calculations and mathematical techniques in atomic and molecular physics excluding electron correlation calculations YEAR: 2006

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