356 citations · 5.2k across the 119 of their papers we have counts for
6 papers · 1 filter
Helium fine structure theory for determination of α
Krzysztof Pachucki, Vladimir A. Yerokhin
We present recent progress in the calculation of the helium fine-structure splitting of the 2^3P_J states, based on the quantum electrodynamic theory. Apart from the complete evalu…
Fine structure of helium and light helium-like ions
Krzysztof Pachucki, Vladimir A. Yerokhin
Calculational results are presented for the fine-structure splitting of the 2^3P state of helium and helium-like ions with the nuclear charge Z up to 10. Theoretical predictions ar…
Isotope Shift Measurements of Stable and Short-Lived Lithium Isotopes for Nuclear Charge Radii Determination
W. Nörtershäuser, R. Sánchez, G. Ewald +18
Changes in the mean-square nuclear charge radii along the lithium isotopic chain were determined using a combination of precise isotope shift measurements and theoretical atomic st…
Applications of four-body exponentially correlated functions
Mariusz Puchalski, Krzysztof Pachucki
We demonstrate the applicability of four-body exponentially correlated functions for the accurate calculations of relativistic effects in lithium-like atoms and present results for…
Fine structure of helium-like ions and determination of the fine structure constant
Krzysztof Pachucki, Vladimir A. Yerokhin
We report a calculation of the fine structure splitting in light helium-like atoms, which accounts for all quantum electrodynamical effects up to order α^5 Ry. For the helium atom,…
Theoretical energies of low-lying states of light helium-like ions
Vladimir A. Yerokhin, Krzysztof Pachucki
Rigorous quantum electrodynamical calculation is presented for energy levels of the 1^1S, 2^1S, 2^3S, 2^1P_1, and 2^3P_{0,1,2} states of helium-like ions with the nuclear charge Z=…