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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/30712
Title: X-RAY IRRADIATION OF H2O + CO ICE MIXTURES WITH SYNCHROTRON LIGHT
Authors: JIMENEZ ESCOBAR, Antonio 
Chen, Y.-J.
CIARAVELLA, Angela 
Huang, C.-H.
MICELA, Giuseppina 
CECCHI PESTELLINI, Cesare 
Issue Date: 2016
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 820
Issue: 1
First Page: 25
Abstract: We irradiated a (4:1) mixture of water and carbon monoxide with soft X-rays of energies up to 1.2 keV. The experiments were performed using the spherical grating monochromator beamline at National Synchrotron Radiation Research Center in Taiwan. Both monochromatic (300 and 900eV) and broader energy fluxes (250–1200eV) were employed. During the irradiation, the H2O + CO mixture was ionized, excited, and fragmented, producing a number of reactive species. The composition of the ice has been monitored throughout both the irradiation and warm-up phases. We identified several products,whichcan be related through a plausible chemical reaction scheme. Such chemistry is initiated by the injection of energetic photoelectrons that produce multiple ionization events generating a secondary electron cascade. The results have been discussed in light of a model for protoplanetary disks around young solar-type stars.
URI: http://hdl.handle.net/20.500.12386/30712
URL: https://arxiv.org/pdf/1810.03302.pdf
https://iopscience.iop.org/article/10.3847/0004-637X/820/1/25
ISSN: 0004-637X
DOI: 10.3847/0004-637X/820/1/25
Bibcode ADS: 2016ApJ...820...25J
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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