New Spectroscopic Determination of the Dipole Moment of HD in the Ground Vibrational State

Abstract

The intensity of the pure rotational spectrum of gaseous HD is measured as a function of density to determine the dipole moment in the ground vibrational state. $J$-dependent values are found in the range (8.0-9.8) \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}4}$ D which, contrary to previous determinations of Trefler and Gush, agree reasonably with ab initio calculations. Intracollisional interference is taken into account and its $J$ dependence determined.