以動力學與競爭模型模擬光刺激發光的性質

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姓名

鄭景元(Jing-yuan Jheng) 查詢紙本館藏

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物理學系

論文名稱

以動力學與競爭模型模擬光刺激發光的性質
(Simulation on the optically stimulated luminescence based on dynamics and competition model)

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摘要(中)

本文主要探討在材料中處於不同陷阱的電子，受光照射而被激發的效率。在整個模擬過程中加入了量子機率的概念，作為決定電子是否被激發的判別，於是光激發的特性可以經由解動力學方程式得到。模擬結果顯示光激發訊號的大小不只受初始陷阱濃度的影響，同時能隙大小、激發光的頻率範圍都會改變發光強度大小。更進一步，可以由模擬結果預測材料的光激發特性，作為日後設計實驗的依據。

摘要(英)

This study discussed the optical pumping effects by two trapped electrons competition in material. In simulation, quantum probability concept was recruited as the criterion of pumping electronic algorithm and the optical luminescence properties could be obtained by solving the dynamics equations. The result not only indicated the optically stimulated luminescence was dominantly affected by initial trapped concentration, trapped energy levels, the profile of pumping photon energy but to predict the optically stimulated luminescence material’’s behavior in clean-down electrons process.

關鍵字(中)

★ 冷發光
★ 熱發光
★ 劑量
★ 光刺激發光

關鍵字(英)

★ OSL TL TLD dose

論文目次

摘要 ................................................................................................................................................. I
ABSTRACT .......................................................................................................................................... II
目錄 .............................................................................................................................................. III
圖目錄 ................................................................................................................................................ V
第1章緒論 ........................................................................................................................................... 1
1-1 背景 ............................................................................................................................................. 1
1-2 研究動機 .................................................................................................................................... 3
1-3 光刺激發光(OSL)簡介 ............................................................................................................... 4
1-4 OSL 應用 ................................................................................................................................. 7
1-4-1 人員體外劑量計 ......................................................................................................... 7
1-4-2 環境劑量偵測 (Environmental dosimetry) ....................................................................... 8
1-4-3 醫療用計量偵測 (Medical dosimetry) .............................................................................. 8
1-4-4 回溯計量偵測(Retrospevtive dosimery) ............................................................................ 8
第2章理論 ......................................................................................................................................... 10
2-1 OSL 理論歷史 ............................................................................................................................ 10
2-1-1 OSL 理論 ............................................................................................................................ 10
2-1-2 光吸收過程(Optical absorption transition) ....................................................................... 10
2-2 吸收截面 ................................................................................................................................... 12
2-3 單陷阱-單中心模型.................................................................................................................. 14
2-4 激發模式 .................................................................................................................................. 19
2-4-1 CW-OSL(continuous wave OSL) ...................................................................................... 19
2-4-2 LM-OSL(linear modulation OSL) ..................................................................................... 20
2-4-3 POSL (pulsed OSL) .......................................................................................................... 22
2-4-4 光照TL ................................................................................................................................ 23
第3章數值模擬 ................................................................................................................................. 25
3-1 OSL 理論 ................................................................................................................................... 26
3-1-1 單競爭模型 ........................................................................................................................ 26
3-1-2 模擬結果 ............................................................................................................................ 30
3-2 雙競爭模型 ............................................................................................................................... 38
3-2-1 理論模型 ............................................................................................................................ 38
3-2-2 量子機率概念的引入 ............................................................................................................ 39
3-2-3 模擬結果 .......................................................................................................................... 40
3-3 討論 .......................................................................................................................................... 45
第4章未來展望 ................................................................................................................................. 46
4-1設計一光電系統 ......................................................................................................................... 46
可以即時讀出OSL的輻射劑量，並評估其效能。 ...................................................................... 46
4-1-1 想法 ................................................................................................................................... 46
4-1-3 驗證溫度效應與環境校正 .............................................................................................. 52
4-2 CROSS SECTION 比較與驗證 .................................................................................................... 55
4-3 TRAPS AND CENTERS 的競爭研究 ............................................................................................ 57
4-4 初步架設 ................................................................................................................................... 59
附錄 ....................................................................................................................................................... 63

參考文獻

參考文獻
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指導教授

謝奇文、陳鎰鋒
(C.W. Hsieh、A.E. Chen)

審核日期

2009-1-19

推文