Higher-order recoil corrections for triplet states of the helium atom

V. Patkos; V. A. Yerokhin; K. Pachucki

doi:10.1103/PhysRevA.94.052508

Higher-order recoil corrections for triplet states of the helium atom

Atomic and Molecular Clusters 2018-05-01 v1

Authors: V. Patkos , V. A. Yerokhin , K. Pachucki

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Abstract

Nuclear recoil corrections of order $\alpha^6\,m^2/M$ are calculated for the lowest-lying triplet states of the helium atom. It improves the theoretical prediction for the isotope shift of the $2^3S-2^3P$ transition energy and influences the determination of the ${}^3\textrm{He}-{}^4\textrm{He}$ nuclear charge radii difference. This calculation is a step forward on the way towards the direct determination of the charge radius of the helium nucleus from spectroscopic measurements.

Keywords

nuclear recoil corrections triplet states helium atom isotope shift nuclear charge radius

Cite

@article{arxiv.1610.04060,
  title  = {Higher-order recoil corrections for triplet states of the helium atom},
  author = {V. Patkos and V. A. Yerokhin and K. Pachucki},
  journal= {arXiv preprint arXiv:1610.04060},
  year   = {2018}
}

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45 pages

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