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Updated: Jul 3, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
Published on: May 3, 2019
High precision atomic theory for Li and Be+: QED shifts and isotope shifts
Z-C Yan1, W Nörtershäuser, G W F Drake
1Department of Physics, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 5A3. zyan@unb.ca
Abstract:
High-precision results are presented for calculations of the nonrelativistic energies, relativistic corrections, and quantum electrodynamic corrections for the 2 2S, 2 2P, and 3 2S states of Li and Be+, using nonrelativistic wave functions expressed in Hylleraas coordinates. Bethe logarithms are obtained for the states of Be+. Finite mass corrections are calculated with sufficient accuracy to extract the nuclear charge radius from measurements of the isotope shift for the 2 2S-2 2P and 2 2S-3 2S transitions. The calculated ionization potential for Be+ is 146 882.923+/-0.005 cm{-1}.
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