標題: Vacuum ultraviolet photolysis of CH4:O-2 ice mixtures and the formation of CO and CO2
作者: Chou, Sheng-Lung
Lin, Meng-Yeh
Huang, Tzu-Ping
Wu, Yu-Jong
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
關鍵字: IR spectroscopy;Photochemistry;Cosmic ices;Interstellar oxygen depletion
公開日期: 5-六月-2020
摘要: Vacuum ultraviolet (VUV) photolysis of CH4:O-2 ice mixtures at 10 K using 121.6, 157, and 170-nm wavelengths was performed to examine photochemical reactions for the oxidation of hydrocarbon species. Ice samples with three component ratios were prepared: CH4-dominated (CH4:O-2 = 100:1), mixed (CH4:O-2 = 1:1), and O-2-dominated (CH4:O-2 = 1:100) ice samples. Photochemical behavior with dependence on the photolysis wavelength and component ratio was observed. In addition, the column densities of CO and CO2 formed by the VUV photolysis of the three ice samples and the abundance ratios of CO and CO2 as a function of the photon dosage and photolysis wavelength were examined. The results may imply a correlation between the unknown depletion of interstellar oxygen and the formation of CO and CO2. (C) 2020 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.molstruc.2020.127954
http://hdl.handle.net/11536/154575
ISSN: 0022-2860
DOI: 10.1016/j.molstruc.2020.127954
期刊: JOURNAL OF MOLECULAR STRUCTURE
Volume: 1209
起始頁: 0
結束頁: 0
顯示於類別:期刊論文