Rydberg states of ${\mathrm{H}}_2$ consisting of a 10F or 10G electron bound to the ν=0,R=1 state of ${\mathrm{H}}_2^{+}$ are studied using Doppler-tuned laser spectroscopy of Rydberg-Rydberg transitions. The positions of all such states are measured to a precision of better than 0.01 ${\mathrm{cm}}^{\mathrm{-}1}$ and are compared with the predictions of the polarization model. The polarization model is derived from first principles. Nonadiabatic corrections to the dipole polarization energies, calculated for the first time, are found to be expressible in terms of the $S_{\mathrm{-}3}$-moment functions of ${\mathrm{H}}_2^{+}$. Higher-order adiabatic polarization energies are estimated from calculated higher-order ${\mathrm{H}}_2^{+}$ polarizabilities.

• Received 26 February 1988

DOI:https://doi.org/10.1103/PhysRevA.38.135