The ν1 + ν3 Bands of 16O18O16O and 16O16O18O

Vibrational Spectra of the16O/17O/18O Substituted Ozone Molecule Isolated in Matrices

“…1 seems unambiguous on the basis of the band center, respectrum of 16 O/ 18 O isotopic ozone species recorded in the same matrices. Careful analysis allowed us to assign all the absorptions without ambiguity despite the overlap of bands belonging to the 768 and 676 species and to 878 and 687 species whose relative abundances were different in the A and B mixtures.…”

“…A number viously (29). After residual oxygen was pumped out, ozone of IR spectroscopic analyses of the first excited states of was subsequently diluted with argon (Air liquide N56) or the different 18 O ozone species have been performed in the nitrogen (Air liquide N56) and used without further purificalaboratory (10)(11)(12)(13)(14)(15)(16)(17)(18). At the present time, studies relative to tion.…”

“…Infrared absorption frequencies of the signal-to-noise ratio and far from saturation for the n 3 mode. six 16 O/ 18 O isotopomers of ozone trapped in various matrices The wavenumber accuracy was 0.1 cm 01 . have been previously reported (23)(24)(25)(26)).…”

“…discharge of an isotopic 16 O 2 / 18 O 2 molecular oxygen mixture However, in order to obtain global information about the (purchased from CEA Eurisotope) and an isotopic 16 O 2 / 17 O 2 / ozone vertical concentration profiles from atmospheric mea- 18 O 2 molecular oxygen mixture (purchased from Isotec) in surements, weak lines belonging to isotopic 18 O and 17 O a pyrex finger immersed in liquid nitrogen as described prespecies have also to be included in the analysis. A number viously (29).…”

“…dimer and polymer absorptions. Matrix samples were preAnalysis is very complicated due to the presence of 18 ozone pared on a gold-plated copper block maintained at 20 K for species produced simultaneously by electric discharge from Ar and 17 K for N 2 by a closed cycle helium refrigerator mixtures of 16 O 2 , 17 O 2 , and 18 O 2 . Matrix isolation work can (Air Product Displex model 202A).…”