Phys. Rev. Lett. 91, 223201 (2003) [4 pages]Direct Measurement of the Thermal Rate Coefficient for Electron Attachment to Ozone in the Gas Phase, 300–550 K: Implications for the IonosphereReceived 30 June 2003; published 24 November 2003 Attachment of thermal electrons to O3 was studied in 133 Pa He between 300–550 K; the process is extremely inefficient. The rate coefficient increases sharply with temperature from 0.9 to 5×10-11 cm3 s-1 (±30%) and comparison to kinetic energy measurements suggests internal energy can drive the reaction. These determinations account for competing processes of diffusion, recombination, and electron detachment reactions, and imply that no significant zero-energy resonance cross section exists, contradicting recent electron-beam results that call for substantial revision of ionospheric models. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.223201
DOI:
10.1103/PhysRevLett.91.223201
PACS:
34.80.Ht, 52.20.Fs, 94.10.Fa, 94.20.Ee
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.