Absorption Spectrum of Ozone in the 105–200 Nm Wavelength Region

Abstract

Excited states of ozone are investigated based on the absorption spectrum measured in the wavelength region 105-200 nm. Two Rydberg series corresponding to the transition 6a1 → ns, np and 4b2 → ns and np were assigned for the most of the strong peaks in the absorption spectrum. In 112-105 nm wavelengths, the progression of vibrational bands with an energy spacing of about 622 cm −1 was measured which was unknown before.Surf. Rev. Lett. 2002.09:125-128. Downloaded from www.worldscientific.com by MCGILL UNIVERSITY on 02/06/15. For personal use only.

The Role of Excited Oxygen Molecules in the Formation of the Secondary Ozone Layer at 87 to 97 km

“…Ozone is the most important UV absorber of all oxygen species. Watanabe et al [18] have measured the ozone UV absorption spectrum over the spectral range of 100-220 nm, and Tu and Nee [26] over the range of 105-200 nm. Ozone absorbs strongly UV radiation entering the MLT layer.…”

“…When ozone is photolyzed by photons of visible light, λ< 611nm, are produced O 2 (a 1 ∆ g ) + O( 3 P). With UV photons λ < 310 nm, the products are O 2 (a 1 Tu and Nee [26] suggested that when a UV photon at the wavelength λ = 121.6 nm dissociates ozone, the result is direct formation of three oxygen atoms from one ozone molecule: . So between the wavelengths of 118.6 to 121.6 nm there is a window in which three oxygen atoms are formed from one ozone molecule.…”