Formation of Compact Amorphous H2O Ice by Codeposition of Hydrogen Atoms with Oxygen Molecules on Grain Surfaces

Details Formation of Compact Amorphous H2O Ice by Codeposition of Hydrogen Atoms with Oxygen Molecules on Grain Surfaces Formation of Compact Amorphous H2O Ice by Codeposition of Hydrogen Atoms with Oxygen Molecules on Grain Surfaces

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...701..464o&link_type=abstract

The Astrophysical Journal, Volume 701, Issue 1, pp. 464-470 (2009).

Astronomy and Astrophysics

Astronomy

23

Atomic Processes, Ism: Clouds

Scientific paper

Formation of H2O molecules through the codeposition of oxygen molecules and hydrogen atoms is examined in situ using IR spectroscopy at 10-40 K under various O2 and H fluxes. It is found that H2O and H2O2 are continuously formed by reaction, even at 40 K. The H2O ice formed is amorphous, but has a compact (not microporous) structure compared to vapor-deposited amorphous H2O ice, because dangling OH bonds are not observed in the IR spectrum. This is consistent with astronomical observations in molecular clouds and theoretical predictions, which suggest that hydrogenation of O2 is one of the potential routes for reproducing these IR spectral characteristics. The composition of the ice formed by codeposition varies with the O2/H ratio and temperature. Although no data are available at present for the H2O/H2O2 ratio of ice in molecular clouds, this study suggests that hydrogenation of O2 has a potential to yield a H2O/H2O2 ratio of 5 or more in molecular clouds.

Affiliated with

Also associated with

No associations

Rating

Formation of Compact Amorphous H2O Ice by Codeposition of Hydrogen Atoms with Oxygen Molecules on Grain Surfaces 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 Formation of Compact Amorphous H2O Ice by Codeposition of Hydrogen Atoms with Oxygen Molecules on Grain Surfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of Compact Amorphous H2O Ice by Codeposition of Hydrogen Atoms with Oxygen Molecules on Grain Surfaces will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1314363