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 |