Theoretical study of the Rydberg spectra of chemically relevant isovalent radicals

In the present work we have studied the Rydberg spectroscopic behavior of t he CH3 and SiH3 isovalent radicals. The molecular-adapted quantum defect or bital (MQDO) method has been employed in our calculations, which have been extended to the radicals' isolated central atoms, C and Si. The similaritie s observed between the intensities of analogous transitions in the atoms an d the corresponding radicals have not only served the purpose of assessing the quality of our calculations but also offer some potential practical use fulness. (C) 2002 John Wiley & Sons, Inc.