Bethe logarithm for the hydrogen molecular ion HD+ -: art. no. 012505

The mean excitation energy (the Bethe logarithm) is calculated for the lowest rotational (up to L=4) and vibrational (up to v=4) states of the hydrogen molecular ion HD+. The calculations are based on a method of the direct integration over photon momenta. The estimated accuracy of obtained values is about six significant digits.