Physics
Scientific paper
Jan 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978georl...5....9r&link_type=abstract
Geophysical Research Letters, vol. 5, Jan. 1978, p. 9-12.
Physics
Atmospheric Chemistry, Atmospheric Radiation, Chlorine, Radioactive Isotopes, Stratosphere, Atmospheric Composition, Chlorine Compounds, Nitrates, Nitrogen Dioxide, Peroxides, Radioactive Decay, Reaction Kinetics
Scientific paper
The cosmogenic radioisotopes Cl-38 (t-1/2 = 37.3 min.) and Cl-39 (t-1/2 = 55.5 min.) are formed in the stratosphere in detectable quantities, and participate in the stratospheric chlorine cycles. The predominant expected chemical forms for these radioisotopes are ClO and/or ClONO2 throughout most of the stratosphere. The rates for formation of HCl are sufficiently slow that most Cl-38 and Cl-39 atoms undergo radioactive decay before ever reacting to form HCl. The measurement of the fraction of Cl-38 and Cl-39 in the forms ClO and ClONO2, with a concurrent NO2 measurement, can be used to measure in situ the stratospheric formation rate for ClONO2. Such experiments could be conducted at altitudes accessible to aircraft experiments.
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