Temperature and Pressure Depences on the Isotopic Fractionation Effect in the Thermal Decomposition of Ozone

Details Temperature and Pressure Depences on the Isotopic Fractionation Effect in the Thermal Decomposition of Ozone Temperature and Pressure Depences on the Isotopic Fractionation Effect in the Thermal Decomposition of Ozone

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jass...14..297k&link_type=abstract

Journal of Astronomy and Space Sciences, vol. 14, no. 2, p. 286-296.

Astronomy and Astrophysics

Astronomy

2

Scientific paper

To understand the mass-independent isotopic fractionation effects, thermal decomposition of ozone was performed. Initial oxygen gas was converted to ozone completely. Then, the ozone was decomposed to oxygen at various temperatures(30~150C). Isotopic compositions of product oxygen and residual ozone were measured using a stable isotope mass spectrometer. The experimental results were compared with the studies which were peformed at the similar conditions. From the raw experimental data, the functions of the instantaneous fractionation factors were calculated by the least square fit. The results clearly showed the temperature dependence. They also showed the pressure dependence and the surface effect. This study may play an important role in the study of ozone decomposition mechanism. It can be applied to explain the mass-independent isotopic pattern found in stratospheric ozone and in meteorites.

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