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研究生： 蕭翊翔
Hsiao, Yi-Hsiang
論文名稱： 氫化鈉分子D1Σ＋電子能態解離極限與雙位能井之光譜研究
Spectroscopic Study of the NaH D1Σ＋ State in the Dissociation Limit and Double-Well Potential
指導教授： 黃守仁
Whang, Thou-Jen
學位類別： 碩士
Master
系所名稱： 理學院 - 化學系
Department of Chemistry
論文出版年： 2007
畢業學年度： 95
語文別： 中文
論文頁數： 85
中文關鍵詞： 雙位能井 、解離極限 、電子能階 、電子態 、氫化鈉
外文關鍵詞： Dissociation Limit, Double-Well Potential, D state, NaH, OODR
相關次數： 點閱：112  下載：0 
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    • 本實驗為使用雙光子共振光譜技術對氣態氫化鈉分子D1Σ＋電子能階進行觀測。主要分為兩個部份。其一為D1Σ＋電子能階解離極限的光譜觀測；另一則是D1Σ＋電子能階雙位能井的谷底光譜觀測。

    在雙位能井的谷底部分，實驗結果由於訊號與本實驗室之前所觀測的部份無法對應，而本次數據相互間亦無法進行雙重確認，故目前難以分析。

    在解離極限附近，我們得到了v*+31~v*+49共17個振動能階的數據，轉動能階分布在J=0~14間，共164個振轉能級。我們還觀測到可能是D1Σ＋電子能階解離極限的訊號，並以此訊號的能量值，由鈉原子譜線推算出NaH分子基態解離能約為15790 cm-1，這與Nedelec在1983年由實驗經外插法獲得的基態解離極限15785±20 cm-1相當的接近。

    In this study, Optical-optical double resonance(OODR) technique was used to detect NaH molecular D1Σ＋ state to the dissociation limit with the double-well potential.

    The experimental results with in the double well of NaH D1Σ＋ state, can not match previous work and hard to confirm. So we are unable to analyze the experimental data.

    In this work we have observed 164 rovibrational levels among 17 vibration levels of D1Σ＋ electronic state near the dissociation limit. We have also found the possible signal of D1Σ＋ state dissociation limit. The De value of the ground state of molecular NaH can be deduced from the observed dissociation energy of D1Σ＋ state. This value is 15790 cm-1 which agrees well with Nedelec et al. results (15785±20 cm-1).

    中文摘要....................................I 英文摘要....................................II 目錄........................................III 表目錄......................................V 圖目錄......................................VI 第一章　緒論................................1 1-1　前言...................................1 1-2　文獻回顧...............................1 1-3　NaH分子D1＋電子能階之雷射光譜研究....4 第二章　理論................................9 2-1　Born-Oppenheimer近似法.................9 2-2　雙原子分子的電子光譜...................13 2-3　雙原子分子電子態躍遷選擇律.............14 2-4　法蘭克-康登原理........................14 2-5　Fano lineshape parameter...............15 第三章　實驗................................19 3-1　實驗的儀器與儀器架構...................19 1.雷射光源..................................19 2.加熱管爐..................................21 3.訊號偵測元件..............................22 4.波長校正儀器..............................22 5.訊號收集與處理系統........................24 3-2　實驗簡介...............................25 1.雙光子共振螢光光譜........................25 2.實驗流程..................................26 第四章 結果與討論..........................40 4-1　NaH分子存在之確認......................40 4-2　NaH分子高能位D1S+電子能階下半部至谷底的偵測..........................................41 1.下半部至谷底的實驗結果....................41 2.下半部至谷底訊號分析遭遇的困難............41 3.對可疑訊號的檢驗..........................43 4-3　NaH分子高能位D1S+電子能階上半部至解離極限的偵測..........................................44 1.上半部至解離極限的實驗結果................44 2.上半部至解離極限的訊號確認................46 3.解離極限的觀測............................47 4.待完成的實驗..............................49 第五章　結論................................74 參考文獻....................................75 附錄........................................77

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