Recent work has shown the success of the semiempirical and zero-free-parameter form of the ligand field model as applied to diatomic rare earth oxides and $fluorides^{1}$. We report here the results of the semiempirically ...

A many lined spectrum which can be attributed to hitherto unknown bands of the $D^{2}\Sigma^{+} -X^{2}\Sigma^{+}$ system of $CaH,^{1}$ has been observed in absorption using a King furnace, The spectra were obtained under ...

Several recent papers have been published using the spectroscopic constants of the $X^{1} \Sigma$ and $D^{1} \Pi$ states of $Na^{39}k$ as determined by $Toueg^{1}$ These constants are incorrect since the rotational quantum ...