Abstract
Experiments in large chambers demonstrate for the first time the recovery of ozone after catalytic destruction by chlorine atoms released from ${\mathrm{CFCl}}_{3}$ under uv radiation. Recovery is brought about by charge attachment to chlorine atoms which encounter a current of low-energy negative charges. These negative chlorine ions do not destroy ozone catalytically and can be collected by positively biased surfaces. The observed recovery of the ozone concentration is in quantitative agreement with a model of successive charge transfers to chlorine to form negative ions. The inclusion of successive charge transfers to chlorine to form negative ions. The inclusion of minority ions does not affect our conclusion. Present results can lead to remediation of stratospheric ozone depletion.
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