@article {Byers Brown373,
author = { and },
title = {Exact formula for the dipole moment of a one-electron diatomic molecule},
volume = {401},
number = {1821},
pages = {373--392},
year = {1985},
doi = {10.1098/rspa.1985.0104},
publisher = {The Royal Society},
abstract = {It is shown that the dipole moment function, μ(R, Za, Zb), for an arbitrary bound electronic state of a one-electron diatomic molecule, with inter-nuclear distance R and atomic numbers Za, Zb may be expressed exactly in terms of the separation eigenconstant C and the electronic energy eigenvalue W of the Schr{\"o}dinger equation by means of the Hellmann-Feynman theorem and a new recursion relation. The formula is used to investigate the behaviour of μ in the vicinity of the united atom and when the nuclei are far apart. The generalization required to extend the relation to other expectation values is derived in an appendix.},
issn = {0080-4630},
URL = {http://rspa.royalsocietypublishing.org/content/401/1821/373},
eprint = {http://rspa.royalsocietypublishing.org/content/401/1821/373.full.pdf},
journal = {Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences}
}