The RbCs X-1 Sigma(+) ground electronic state: New spectroscopic study

In this paper a new spectroscopic investigation on the X(1)Sigma(+) electro nic ground state of the RbCs molecule is reported. This study is conducted by using laser-induced fluorescence combined with Fourier transform spectro scopy (LIF-FTS). More than 23 000 spectral data are used in a global linear reduction to molecular constants. With these new and improved molecular co nstants, the potential energy curve has been calculated by the inverted per turbation approach (IPA). Accurate values for the dissociation energy and t he long-range parameters have been derived. (C) 1999 Academic Press.