二氧化碳在62-120nm的光化學; Photochemistry of carbon dioxide at 62–120 nm

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题名:	二氧化碳在62-120nm的光化學;Photochemistry of carbon dioxide at 62–120 nm
作者:	戴薇安;Dewi Anggraeni
贡献者:	物理研究所
关键词:	;carbon dioxide;photoabsorption cross section;fluorescence
日期:	2011-07-27
上传时间:	2012-01-05 14:42:28 (UTC+8)
摘要:	在這篇論文中，吸收和熒光發射光譜的二氧化碳進行了研究，利用同步輻射光源從 6m高通量光束線在SRRC，台灣。光吸收截面的二氧化碳在波長62 - 120納米已而得。吸收和熒光測量也已被用來分配裡德堡態匯聚成CO2+ (X2 ?g1/2)，田中，小川系列匯聚成CO2+ (A 2?u),亨寧漫和夏普系列匯聚成CO2+ (B 2?u+), 並 TJL系列匯聚成CO2+ (C2?g+). 電離勢（IP）為 CO2 +離子狀態已經來自這項任務，如IP為CO2+ (A 2?u)是17.36 eV的，IP為CO2+ (B 2?u+) 為18.07 eV的，和IP CO2+ (C2?g+) 為19.39 eV的。從熒光光譜，我們觀察到第四個積極的波段內，排放的二氧化碳(A1??– X1?+) 在69 - 80 nm的入射光子的能量。O(1S)的生產從二氧化碳光解波長範圍在105 - 120納米也被觀察到使用高壓氙氣，以提高O(1S)到O（1D）的過渡。從這個結果我們發現，二氧化碳 1?u+ 是一個具有挑戰性的光解通道O(1S)，我們還建議，3p? 1?u狀態可能是一個通道，產生 O（1S）。 In this thesis, absorption and fluorescence emission spectra of carbon dioxide have been studied using synchrotron radiation light source from 6m-high flux beamline at SRRC, Taiwan. Photoabsorption cross section of carbon dioxide at wavelength 62 – 120 nm has been derived. Absorption and fluorescence measurement also has been used to assign Rydberg states converging to CO2+ (X2 ?g1/2), Tanaka-Ogawa series converging to CO2+ (A 2?u), Henning Diffuse and Sharp series converging to CO2+ (B 2?u+), and TJL series converging to CO2+ (C2?g+). Ionization potential (IP) for CO2+ ionic state has been derived from this assignment, such as IP for CO2+ (A 2?u) is 17.36 eV, IP for CO2+ (B 2?u+) is 18.07 eV, and IP for CO2+ (C2?g+) is 19.39 eV. From the fluorescence spectrum, we observed fourth positive band as a emission of CO (A1??– X1?+) at 69 – 80 nm incident photon energy. O(1S) production from CO2 photodissociation in the wavelength range 105 – 120 nm has also been observed using high pressure Xenon to enhance O(1S) to O(1D) transition. From this result we observed that CO2 1?u+ be a challenging photodissociation channel of O(1S) and we also suggest that 3p? 1?u states may be a channel to produce O(1S).
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