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Physical and spectroscopic properties of pure C2H4 and CH4:C2H4 ices

AutorMolpeceres, Germán; Satorre, Miguel Angel; Ortigoso, Juan ; Zanchet, Alexandre ; Luna, Ramón; Millán, Carlos; Escribano, Rafael ; Tanarro, Isabel ; Herrero, Víctor J. ; Maté, Belén
Palabras claveMethods: laboratory: solid state
Techniques: spectroscopic
Planets and satellites: composition
Infrared: planetary systems
Fecha de publicación7-dic-2016
EditorOxford University Press
CitaciónMonthly Notices of the Royal Astronomical Society, 466: 1894–1902 (2017)
ResumenPhysical and spectroscopic properties of ices of C2H4 and CH4:C2H4 mixtures with 3:1, 1:1 and 1:3 ratios have been investigated at 30 K. Two laboratories are involved in this work. In one of them, the density and refractive index of the samples have been measured by using a cryogenic quartz microbalance and laser interferometric techniques. In the other one, IR spectra have been recorded in the near- and mid-infrared regions, and band shifts with respect to the pure species, band strengths of the main bands, and the optical constants in both regions have been determined. Previous data on ethylene and the mixtures studied here were scarce. For methane, both the wavenumbers and band strengths have been found to follow a regular pattern of decrease with increasing dilution, but no pattern has been detected for ethylene vibrations. The method employed for the preparation of the samples, by vapour deposition under vacuum, is thought to be adequate to mimic the structure of astrophysical ices. Possible astrophysical implications, especially by means of the optical constants reported here, have been discussed. 2016 The Authors; Published by Oxford University Press on behalf of the Royal Astronomical Society
Descripción9 págs.; 8 figs.; 3 tabs.
Versión del editorhttps://doi.org/10.1093/mnras/stw3166
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