Effects of low concentrations of O2 and CO on the ion-clustering reactions in the lower ionosphere of Mars |
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| Authors: | LW Sieck R Gorden P Ausloos |
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| Institution: | National Bureau of Standards, Physical Chemistry Division, Washington, D.C. 20234, U.S.A. |
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| Abstract: | It is demonstrated that under conditions which approximate those of the Martian ionosphere traces of CO and O2 can be effectively incorporated in ion clusters via ion-molecule reaction schemes initiated by the CO2+ ion. For example, when 0.3 % CO is added to CO2, (CO)2+ and (CO)2CO2]+ appear as the major cations (584 Å radiation, 300°K). In mixtures containing O2 in addition to CO2 (CO2. O2)+ and (CO2)2O2]+ are important species. A recently proposed mechanism to account for the low abundance of CO and O2 in the Martian atmosphere is discussed in the light of these observations. |
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