本論文利用可見光-可見光雙共振光譜學技術研究碘化氰分子經266 nm雷射光解，產生氰自由基光解碎片的電子光譜學( B ← A ← X )。雙共振實驗的執行條件為ICN壓力五毫托爾的流動槽環境、溫度298 K，光解光源為銣钇鋁榴石雷射的四倍頻輸出。基態氰基自由基偵測採雙共振激發技巧而其螢光放射強度由光電倍增管量測，螢光訊號經積分器紀錄後可直接獲得激發頻譜，最後由實驗結果配合光譜學理論可求得A態氰自由基轉動常數。

The optical-optical double resonance spectroscopic technique was employed to investigate CN photofragments from ICN photodissociation at 266 nm. The electronic spectroscopy (B ← A ← X) of CN radicals was studied in this thesis. The double resonance experiments were executed in a flow cell with 5 mTorr ICN at 298K and the photodissociation light source was generated from the fourth harmonic output of a Nd: YAG laser. The ground state CN radicals were probed by a double resonance excitation scheme and the fluorescence emissions were measured by a photomultiplier detector. Fluorescence signals were registered by a boxcar integrator and the excitation spectra could be obtained in a straightforward fashion. From the experimental results and spectroscopic theories, the rotational constant of A state CN can be determined.

論文審定書…………………………………………………………… i
誌謝…………………………………………………………………… ii
中文摘要………………………………………………………….….. iii
英文摘要………………………………………..……………………. iv
目錄……………………………………………………………………….v
圖目………………………………………………………………………vii
表目………………………………………………………………………x
第一章 緒論……………………………………………………………1
1.1 前言……………………………………………………………….1
1.2 文獻探討及研究動機…………………………………………….4
第二章 實驗架設……………………………………………………..10
2.1實驗儀器介紹…………………………………………...……….10
2.2實驗架設及時序控制……………………………………………14
第三章 實驗頻譜辨認及結果分析………………………..................17
3.1氰自由基轉動能階及波函數推導………………………………17
3.2雙共振激發頻譜譜線辨認………………………………………24
3.3實驗結果分析……………………………………………………35

第四章 結論…………………………………………………………..38
參考文獻………………………………………………………………..39

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