CHEMICAL EVOLUTION of A CO ICE INDUCED by SOFT X-RAYS

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题名:	CHEMICAL EVOLUTION of A CO ICE INDUCED by SOFT X-RAYS
作者:	陳俞融;Ciaravella, A.;Chen, Y.-J.;Cecchi-Pestellini, C.;Jiménez-Escobar, A.;Muñoz Caro, G. M.;Chuang, K.-J.;Huang, C.-H.
贡献者:	理學院物理學系
关键词:	ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;ATOMS;Carbon;CARBON MONOXIDE;Chemical evolution;CORRELATIONS;COSMOCHEMISTRY;DENSITY;Fluxes;Gratings (spectra);ICE;INFRARED SPECTRA;INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;IRRADIATION;ISM: molecules;KEV RANGE;methods: laboratory: molecular;MOLECULES;MONOCHROMATIC RADIATION;Monochromators;RESIDUES;SOFT X RADIATION;Soft x-rays;SPHERICAL CONFIGURATION;SYNCHROTRON RADIATION;X-rays: ISM
日期:	2016-03-01
上传时间:	2026-04-23 11:45:13 (UTC+8)
出版者:	IOP Publishing Ltd.;United States: The American Astronomical Society
摘要:	摘要： ABSTRACT We irradiated a pure carbon monoxide ice with soft X-rays of energies up to 1.2 keV. The experiments were performed using the spherical grating monochromator beamline at the National Synchrotron Radiation Research Center in Taiwan, exploiting both monochromatic (at 0.3 and 0.55 keV) and broader energy (0.25-1.2 keV) fluxes. The infrared spectra of the irradiated ices showed the formation of a number of products such as polycarbon mono- and dioxides CnOm, and chains containing up to 10 carbon atoms. While a gentle increase in the energy absorbed by the ice sample is reflected by an increase in the column densities of newly born species, such correlation breaks down at very high fluxes. In this regime the production yield falls down sharply by about a factor of 100. The refractory residue obtained in the broad energy irradiation is a "compromise" between those obtained with proton irradiation of C3O2 and CO ices in previous experiments. Finally, we discuss the possible implications for space chemistry 其他題名： APJ 其他題名： Astrophys. J 出版者： United States: The American Astronomical Society 出版日期： 2016-03-01 出處： The Astrophysical journal, 2016-03, Vol.819 (1), p.38 資源來源： Institute of Physics Journals 版權： 2016. The American Astronomical Society. All rights reserved. 識別號： ISSN: 0004-637X 識別號： ISSN: 1538-4357 識別號： EISSN: 1538-4357 識別號： DOI: 10.3847/0004-637X/819/1/38
显示于类别:	[物理學系] 期刊論文

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