Production of Oxidants by Ion Irradiation of Water/Carbon Dioxide Frozen Mixtures

Details Production of Oxidants by Ion Irradiation of Water/Carbon Dioxide Frozen Mixtures Production of Oxidants by Ion Irradiation of Water/Carbon Dioxide Frozen Mixtures

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005asbio...5..612s&link_type=abstract

Astrobiology, Volume 5, Issue 5, pp. 612-621.

Biology

12

Radiation Chemistry, Surfaces, Satellites, Ices, Oxidants

Scientific paper

We present new experimental results on the formation of oxidants, such as hydrogen peroxide, ozone, and carbonic acid, under ion irradiation of icy mixtures of water/carbon dioxide at different ratios and temperatures (16 and 80 K). Pure water ice layers and mixtures with carbon dioxide were irradiated by 200 keV He+ ions. We found that the CO2/H2O ratio progressively decreased to a value of about 0.1, the H2O2 production increased with increasing CO2 abundance at both 16 and 80 K, and the CO and H2CO3 production increased with increasing CO2 abundance at 16 K. At 80 K, the synthesis of CO was less efficient because of the high volatility of the molecule that partially sublimed from the target. The production of carbonic acid was connected with the production of CO3. O3 was detected only after ion irradiation of CO2-rich mixtures. The experimental results are discussed with regard to the relevance they may have in the production of an energy source for a europan or a martian biosphere.

Affiliated with

Also associated with

No associations

Rating

Production of Oxidants by Ion Irradiation of Water/Carbon Dioxide Frozen Mixtures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Production of Oxidants by Ion Irradiation of Water/Carbon Dioxide Frozen Mixtures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of Oxidants by Ion Irradiation of Water/Carbon Dioxide Frozen Mixtures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1620633