The REMPI Spectra of SF₂ Radical in B State

The SF₂⁺ signals were found prominment in the range of 235~270nm by radiating the SF₆ molecules and their fragments with unfocused laser. The fragments of SF₆ molecules were produced in the dc discharge of the SF₆/Ar （1/10） mixture. The perturbation caused by the dc-discharge ions has been eliminated successfully in the process of probing REMPI ions, The correlation between the magnitude of the SF₂⁺ signal and the wavelength of laser was observed in this range. The correlation between the magnitude of the SF₂⁺ signal and the intensity of laser was obtained in the wavelength of 247.09nm. We estimate that there probably is a new electronic state in the energy tange of 38623~42328 cm^-1 in the base of analysis of the experimental data. The vibronic frequency ofv₁ vibronic mode ω₁=926 （4） cm^-1 and the probably band origin T₀=38623 cm^-1 are reported. The new state is temporarily assigned to the B state of SF₂ radical in terms of its energy 1evel.