IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Surface Science Tuesday Sessions
       Session SS2-TuM

Paper SS2-TuM9
The Interaction of Carbon Monoxide with Hydrogen-bonding Molecular Ice Surfaces

Tuesday, October 30, 2001, 11:00 am, Room 122

Session: Water at Surfaces
Presenter: M.R.S. McCoustra, University of Nottingham, UK
Authors: J.W. Dever, University of Nottingham, UK
M.P. Collings, University of Nottingham, UK
M.R.S. McCoustra, University of Nottingham, UK
Correspondent: Click to Email
Carbon monoxide (CO) is the second most abundant molecule in the Universe after hydrogen. It's interaction with solid grain surfaces is key therefore to understanding gas-grain interactions in the interstellar medium, whether those interactions relate to the freezing out of molecules on grains in cold, dark molecular clouds or their eventual reappearance in the gas phase and their role in radiative cooling of warm, collapsing proto-stellar objects. Using a combination of temperature programmed desorption (TPD) and reflection-absorption infrared spectroscopy (RAIRS), we have conducted state-of-the-art surface physicochemical studies of the interaction of CO with hydrogen-bonded molecular ice (water, ammonia and methanol) surfaces that represent a model of the surfaces of some types of interstellar grains. We will present the results of these first detailed ultrahigh vacuum studies of realistic gas-grain interactions and their interpretation in terms of simple models of the CO-ice interaction.