IMPROVED KRF(B) AND KRF(X) STATE POTENTIALS

The KrF(B-X) emission spectra were simulated to obtain improved models of the electronic state potentials and transition dipole moment funct ions that are also consistent with recently published photoassociation spectra. The spectrum from a 300 K vibrational distribution of KrF(B) molecules was used to determine the nature of the potentials near R(e )'; the transition dipole function was mainly based on the emission sp ectra from highly excited KrF(B,upsilon') distributions. The upper sta te potential was represented by a truncated Rittner potential with ome ga(e)' = 330 cm-1; the lower state potential was represented by an exp onential function at a short internuclear distance plus a - C6/R6 func tion at a large distance. The electronic transition dipole moment func tion mu(el)(R) was represented by a linear combination of Gaussian fun ctions, with a maximum near the classical inner turning points of the upsilon' = 5, 6 levels. Comparison is made with the KrF(X) potential d educed from molecular beam work. The well depth assigned by Aquilanti et al. from the scattering data is larger than the value obtained from the -c6/R6 function, and additional experimental work is needed to de fine D(e)''.