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Title: Relativistic and QED Corrections for the Beryllium Atom
Authors: Pachucki, Krzysztof
Komasa, Jacek
Keywords: beryllium atom
relativistic corrections
quantum electrodynamics corrections
Bethe logarithms
Ionization potential
Correlated Gaussian functions
Issue Date: 2004
Publisher: American Physical Society
Citation: Phys. Rev. Lett. 92, 213001 (2004)
Abstract: Complete relativistic and quantum electrodynamics corrections of order α2 Ry and α3 Ry are calculated for the ground state of the beryllium atom and its positive ion. A basis set of correlated Gaussian functions is used, with exponents optimized against nonrelativistic binding energies. The results for Bethe logarithms lnk0(Be)=5.750 34(3) and lnk0(Be+)=5.751 67(3) demonstrate the availability of high precision theoretical predictions for energy levels of the beryllium atom and light ions. Our recommended value of the ionization potential 75 192.514(80)   cm-1 agrees with equally accurate available experimental values.
ISSN: 1079-7114
Appears in Collections:Artykuły naukowe (WCh)

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