PLANETARY AERONOMY ⅪⅤ: ULTRAVIOLET ABSORPTION OF SO2 DISSOCIATION ENERGIES OF SO2 AND SO

摘要

The absorption intensities of SO2were measured in the wavelength region 2000 Å - 3100 Å employing the hydrogen continuum as the source and at selected wavelengths utilizing the mercury line spectrum. The pressure dependence of the absorption intensity was investigated at 1849Å, 2537Å, and 3131Å. The existence of an absorption continuum in the spectral region 1700Å - 2300 Å has been established and attributed to the dissociation of SO2 forming SO and a ground state oxygen atom. The onset of the continuum provides an upper limit value to the dissociation energy of SO2. The implications upon the SO2 and SO dissociation energies are discussed.