Abstract
Theoretical and experimental studies have been carried out to investigate the spectroscopic data on ionic excimers. Calculated emissions of Rb2+F- agreed with the emission spectra with good accuracy. Ab initio calculations showed the scaling of emission wavelength on atomic num-ber of rare gas atoms and alikali atoms. The Cs2+F- emission spectra excited by intense electron beams were identified as B-X transition at 185 nm and as D-X transition at 152 nm. The formation mechanism was discussed from the buffer gas effects.