Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....6581d&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #6581
Astronomy and Astrophysics
Astrophysics
Scientific paper
A large number of molecular species have been detected on the surfaces of satellites in our solar system, on comets and in dense clouds in the interstellar medium. The mechanisms involved in the formation of molecules in or on the surfaces of ices in astrophysical environments are not yet well understood. A prototype apparatus has been built and is being tested to study the synthesis of molecules in the solid state, stimulated by electron, ion and photon irradiation, under a variety of astrophysical conditions. The ices are deposited directly onto a cold substrate and analogous astrophysical environments are set up by varying the composition, thickness and the temperature of ice samples and the energy, flux and type of processing radiation. The apparatus has been adapted for use in conjunction with synchrotron radiation sources at Aarhus, Denmark and Daresbury, UK, and the ECR ion source at Queen's University, Belfast as well as lab-based small-scale sources such as an electron gun and a UV lamp. The irradiation products are monitored by a combination of VUV (synchrotron), UV-Vis and FTIR spectroscopy. This presentation will include a description of the apparatus and preliminary results of ion and synchrotron irradiated ices.
Dawes Anita
Holtom P.
Mason Nigel J.
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