N2; + CH4 + H2O 混合冰晶在氫氣微波放電光源照射下的光化產物 Products of ice mixture of N2 + CH4 + H2O after hydrogen discharge lamp irradiated

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/43859

Title:	N2;+ CH4 + H2O 混合冰晶在氫氣微波放電光源照射下的光化產物 Products of ice mixture of N2 + CH4 + H2O after hydrogen discharge lamp irradiated
Authors:	吳允中;Yun-chong Wu
Contributors:	物理研究所
Keywords:	光化;冰晶;崔頓;放射;irradiation;Triton;ice;photolysis
Date:	2010-07-17
Issue Date:	2010-12-08 14:23:35 (UTC+8)
Publisher:	國立中央大學
Abstract:	近數十年來，伴隨著太空科技的快速進步，我們對於太空中星際物質以及太陽系行星大氣組成成分的了解也是與日俱增。目前所知H2O、CO、CO2是星際物質最主要的組成物，而這些分子是組成更為複雜分子的關鍵物質。本實驗主要是以氫氣微波放電管所產生的121.6 nm 波長的光與寬帶至160nm氫分子光譜為主的真空紫外光作為光源，照射鍍在基板上的冰晶。接著再利用質譜儀及紅外線光譜儀測量冰晶的組成成分與質量變化。在混合冰晶比例為 N2 : CH4 : H2O = 9.8 : 1.8 : 0.02 的實驗中，在氫氣放電管照射超過24小時的過程中，觀察到了CH4的衰減，C2H6、CO2、13CO2、CO以及N2O的生成，而在回溫過程中則觀察到了H2CO的產生。而在混合冰晶比例為 N2 : CH4 : H2O = 9.8 : 0.18 : 0.02 的實驗中，在氫氣放電管照射24小時的過程中，同樣觀察到了CH4的衰減，以及少量的C2H6與CO2的生成。 In the last decades,accompany to the improvement of the space technology,knowledge about the atmospheric composition of the planet in the solar system and the composition of the interstellar medium is increasing day by day.Today we know that H2O、CO、CO2 is the main composition of the interstellar medium,and these molecule are key to produce more complex molecule. In this work, we use hydrogen discharge lamp with 121.6 nm and hydrogen molecular band at 160 nm VUV as photon source to irradiate the ice on the substrate.Then we use QMS and FTIR to detect the composition and mass variation of the ice. We irradiated the ice mixture of N2 : CH4 : H2O = 9.8 : 1.8 : 0.02 more than 24 hour.In the procedure of the irridiation,CH4 decay and products of C2H6、CO2、13CO2、CO、N2O was observed.In the procedure of warming up, we also detected the product of H2CO. We also irradiated the ice mixture of N2 : CH4 :H2O = 9.8 : 0.18 : 0.02 for about 24 hour.We again observed CH4 decay,but we 4 observed a few of C2H6 and CO2 in the procedure of irradiation and warming up the substrate to room temperature.
Appears in Collections:	[Graduate Institute of Physics] Electronic Thesis & Dissertation

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