Finite nuclear mass corrections to electric and magnetic interactions in diatomic molecules

TL;DR

This paper develops a systematic perturbative approach to calculate finite nuclear mass corrections in diatomic molecules, enhancing the accuracy of interpreting precise molecular measurements.

Contribution

It provides explicit formulae for leading corrections to relativistic energy, electric dipole moments, polarizability, and magnetic shielding in diatomic molecules.

Findings

Derived formulae for finite nuclear mass corrections

Improved accuracy in molecular property calculations

Systematic perturbative approach established

Abstract

In order to interpret precise measurements of molecular properties the finite nuclear mass corrections to the Born-Oppenheimer approximation have to be accounted for. It is shown that they can be obtained systematically in the perturbative approach. The formulae for the leading corrections to the relativistic contribution to energy, the transition electric dipole moment, the electric polarizability, and the magnetic shielding constant are presented.