2000 character limit reached
Non-adiabatic, Relativistic, and Leading-order QED Corrections for Rovibrational Intervals of $^4$He$_2^+$ ($X\ ^2Σ_\mathrm{u}^+$) (2011.03540v2)
Published 6 Nov 2020 in physics.atom-ph, physics.chem-ph, and quant-ph
Abstract: The rovibrational intervals of the $4$He$_2+$ molecular ion in its $X\ 2\Sigma_\text{u}+$ ground electronic state are computed by including the non-adiabatic, relativistic, and leading-order quantum-electrodynamics corrections. Good agreement of theory and experiment is observed for the rotational excitation series of the vibrational ground state and the fundamental vibration. The lowest-energy rotational interval is computed to be $70.937\ 69(10)$ cm${-1}$ in agreement with the most recently reported experimental value, $70.937\ 589(23)(60)_\text{sys}$ cm${-1}$ [L. Semeria, P. Jansen, G.-M. Camenisch, F. Mellini, H. Schmutz, and F. Merkt, Phys. Rev. Lett. 124, 213001 (2020)].