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Phys. Rev. A 64, 042510 (2001) [5 pages]

Forbidden transitions in the helium atom

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Grzegorz Łach1,2 and Krzysztof Pachucki1
1Institute of Theoretical Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland
2Quantum Chemistry Laboratory, Warsaw University, Pasteura 1, 02-093 Warsaw, Poland

Received 31 May 2001; published 18 September 2001

Nonrelativistically forbidden, single-photon transition rates between low-lying states of the helium atom are rigorously derived within quantum electrodynamics theory. Equivalence of velocity and length gauges, including relativistic corrections is explicitly demonstrated. Numerical calculations of matrix elements are performed with the use of high-precision variational wave functions and compared to former results.


©2001 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.64.042510
DOI: 10.1103/PhysRevA.64.042510
PACS: 31.30.Jv, 12.20.Ds, 32.70.Cs, 31.15.Md

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