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Author Wu, Yu-Jong ♦ Lin, Meng-Yeh ♦ Chou, Sheng-Lung ♦ Chen, Hui-Fen ♦ Lu, Hsiao-Chi ♦ Chen, Hong-Kai ♦ Cheng, Bing-Ming
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ♦ ABSORPTION SPECTRA ♦ ACETYLENE ♦ AEROSOLS ♦ ASTROPHYSICS ♦ CARBON ♦ COSMOLOGY ♦ FAR ULTRAVIOLET RADIATION ♦ NEON ♦ PHOTOLYSIS ♦ VINYL RADICALS ♦ ALKYL RADICALS ♦ ALKYNES ♦ CHEMICAL REACTIONS ♦ COLLOIDS ♦ DECOMPOSITION ♦ DISPERSIONS ♦ ELECTROMAGNETIC RADIATION ♦ ELEMENTS ♦ FLUIDS ♦ GASES ♦ HYDROCARBONS ♦ NONMETALS ♦ ORGANIC COMPOUNDS ♦ PHOTOCHEMICAL REACTIONS ♦ PHYSICS ♦ RADIATIONS ♦ RADICALS ♦ RARE GASES ♦ SOLS ♦ SPECTRA ♦ ULTRAVIOLET RADIATION
Abstract The absorption spectrum of ethyne, C{sub 2}H{sub 2}, in solid Ar was measured in the wavelength region 107-220 nm with light from a synchrotron. Based on that absorption, irradiation of samples of ethyne dispersed in neon with vacuum-ultraviolet (VUV) radiation yielded various products that were identified through their infrared absorption spectra including C{sub n} (n = 3-12), C{sub 2}H, C{sub 2}H{sub 3}, C{sub 4}H, C{sub 4}H{sub 2}, C{sub 8}H{sup -}, and C{sub 8}H{sub 2}. The efficiency of photolysis of ethyne and the nature of photoproducts depend on the selected wavelength of VUV light. Information about the photodissociation of C{sub 2}H{sub 2} with various photon energies and the formation and identification of large carbon clusters and hydrides at low temperature might be useful in photochemical models to simulate the composition of the atmosphere of Titan and as a source of aerosols.
ISSN 0004637X
Educational Use Research
Learning Resource Type Article
Publisher Date 2010-09-20
Publisher Place United States
Journal Astrophysical Journal
Volume Number 721
Issue Number 1


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