Nonadiabatic, Relativistic, and Leading-Order QED Corrections for Rovibrational Intervals of ~4He_2~+ (X ~2∑_u~+)

摘要

The rovibrational intervals of the He-4(2)+ molecular ion in its X-2 Sigma(+)(u) ground electronic state are computed by including the nonadiabatic, 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 69o10THORN cm(-1) in agreement with the most recently reported experimental value, 70.937 589(23)(60)(sys) cm(-1)