Physics – Atomic Physics
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985e%26psl..73....1n&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 73, no. 1, April 1985, p. 1-16.
Physics
Atomic Physics
41
Anomalies, Electromagnetic Shielding, Meteorites, Oxygen Isotopes, Photodissociation, Ultraviolet Radiation, Absorption Spectra, Abundance, Extinction, Pressure Dependence, Quenching (Atomic Physics), Reaction Kinetics, Trapping, Meteorites, Oxygen, Isotopes, Anomalies, Samples, Meteorite, Ultraviolet, Wavelengths, Radiation, Photodissociation, Analysis, Chemistry, Kinetics, Entrapment, Gases, Composition, Temperature, Calculations, Abundance, Density, Depletion, Experiments, Hypotheses, Pressure, Models
Scientific paper
The production of isotopic effects in oxygen due to self-shielding of photolysing radiation by the Schumann-Runge bands of (O-16)2 is investigated. The model studied is the simple case of incoming radiation falling on a gaseous medium of uniform composition. The enhancement of O-17 and O-18 production upon photodissociation of O2 is calculated for various column densities, and its dependence on temperature and the presence of other molecules is examined. The issue of whether the products of photolysis can be trapped and thus preserve a peculiar isotopic composition is discussed.
Navon Oded
Wasserburg Gerald J.
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