Energetic ballistic deposition of volatile gases into ice

[Display omitted] ► Xenon is stably embedded in ice via energetic collision. ► Trapped at temperatures nearly 100K above surface desorption temperature. ► Non-equilibrium process, surface trapped xenon cannot penetrate into the ice at 120K. Gases are trapped in ice when they adsorb to the surface an...

Full description

Saved in:
Bibliographic Details
Published in:Chemical physics letters 2012-04, Vol.531, p.18-21
Main Authors: Gibson, K.D., Killelea, Daniel R., Becker, James S., Yuan, Hanqiu, Sibener, S.J.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] ► Xenon is stably embedded in ice via energetic collision. ► Trapped at temperatures nearly 100K above surface desorption temperature. ► Non-equilibrium process, surface trapped xenon cannot penetrate into the ice at 120K. Gases are trapped in ice when they adsorb to the surface and are subsequently buried by further adsorption of water. Low surface temperatures, where the surface residence time of the gas is long, are needed to permit burial. Here, we demonstrate a new mechanism, energetic ballistic deposition, which has not been previously reported. Translationally energetic xenon atoms penetrate the ice surface and become stably embedded within the ice well above the xenon desorption temperature. This new mechanism for gaseous incorporation warrants consideration in models that seek to accurately describe the trapping and concentration of volatile gases in molecular solids.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2012.02.040