Rovibrational computations for the He$_2$ a $^3\Sigma_\mathrm{u}^+$ state including non-adiabatic, relativistic, and QED corrections
Chemical Physics
2026-02-25 v2
Abstract
A potential energy curve (PEC) accurate to a fraction of 1 ppm () is computed for the state of He endowed with relativistic and QED corrections. The nuclear Schr\"odinger equation is solved on this PEC with diagonal Born-Oppenheimer and non-adiabatic mass corrections to obtain highly accurate rotational-vibrational levels. The computed rovibrational intervals and fine-structure splittings, spanning over several orders of magnitude in energy, are found to be in remarkable agreement with available high-resolution spectroscopy data.
Keywords
Cite
@article{arxiv.2506.19116,
title = {Rovibrational computations for the He$_2$ a $^3\Sigma_\mathrm{u}^+$ state including non-adiabatic, relativistic, and QED corrections},
author = {Ádám Margócsy and Balázs Rácsai and Péter Jeszenszki and Edit Mátyus},
journal= {arXiv preprint arXiv:2506.19116},
year = {2026}
}