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| 研究生： |
莊彧年 Chuang, Yu-Nien |
|---|---|
| 論文名稱： |
氘化鈉A1Σ+能態雷射光譜延伸研究及分析 Extended analysis of the A1Σ+ state of NaD by laser spectroscopy |
| 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： | 2016 |
| 畢業學年度： | 104 |
| 語文別： | 中文 |
| 論文頁數： | 138 |
| 中文關鍵詞： | 氘化鈉 、雷射光譜 、RKR位能曲線 、分子常數 、同位素效應 |
| 外文關鍵詞： | sodium deuteride, laser spectroscopy, RKR potential curve, isotopic effect, molecular constants |
| 相關次數： | 點閱：227 下載：0 |
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本篇實驗利用雷射誘導螢光激發光譜偵測氘化鈉單重基態X1Σ+能態與第一單重激發態A1Σ+能態之間分子振轉能級躍遷訊號，並進一步擬合出氘化鈉A1Σ+能態之分子常數(登亥姆係數)，與歷年實驗值與理論值做一系列比較。實驗部分是利用Nd-YAG雷射激發與六種染料(Exalite 392E、Exalite 400E、Stilbene 420、Coumarin 440、LDS722、LDS759)偵測不同波段的激發光譜，掃描範圍為360-441 nm，收集到v”=0, 1至v’=5-21之電子躍遷訊號，轉動能級觀測最高至J’=33，共1397組訊號。本論文以氫化鈉同位素折合質量縮放計算v”=0-4, J’=0-20與本實驗觀測結果共同擬合出一套分子常數求得分子常數:Te=22712.52 cm-1、we=229.8 cm-1、wexe=-1.20 cm-1、Be=0.895 cm-1、ae=-0.032 cm-1、De=0.59*10-4 cm-1。利用分子常數建立RKR位能曲線，其平衡核間距算出Re=3.189 Å。A1Σ+能態分子常數∆Gv+1/2、Bv趨勢異常變化與理論計算做比較(DPF理論計算)有良好一致性，∆Gv+1/2(max)=260.34 (260.27) cm-1皆在v’=12、Bv(max)=1.012 (1.013) cm-1皆在v’=8。
Laser-induced fluorescence spectra of the A1Σ+ state of gaseous sodium deuteride (NaD) from 360-441 nm have been measured using dye laser pumped by Nd-YAG laser. Extended analysis of the new ro-vibrational levels have been observed up to v’=21, and J’=33, respectively. With a total of 1397 data found in this work and combined with data measured by others to determine a new set of Dunham coefficients for A1Σ+ state and also construct the rotationless Rydberg-Klein-Rees curve. Experimental values of Gv, Bv, and Dv compared with theoretical calculations and the Dunham coefficients of NaH by mass-reduced scaling shows fair agreement in this work.
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校內：2021-08-09公開校外：不公開