- 期刊
光激發光劑量計與氟化鋰熱發光劑量計輻射偵測特性之研究比較
Study and Intercomparison of Radiation Measurement Characteristics for OSLD and TLD-LiF
摘要
以三氧化二鋁添加碳活化劑的光激發光劑量計（OSLD）為近年研發成功的劑量計，相較於熱發光劑量計（TLD），OSLD具光激發光、快速計讀、寬廣的輻射劑量偵測範圍、高敏度及可重複計讀分析劑量等優點，在劑量驗證上極具優勢。本研究比較評估InLight nanoDot^TM - OSLD及TLD-100H氟化鋰熱發光劑量計之輻射偵測特性，評估比較之項目包括一批劑量計讀值之變異係數、劑量計輻射回應之再現性、加馬劑量與發光量之特性曲線、光子能量依持性、劑量計的角度依持性與消光效應等。研究結果顯示（1）一批OSLD劑量計對輻射回應的變異係數較經ECC或未經ECC修正之TLD-100H低，（2）OSLD 經單次輻射照射，並連續計讀10次後之讀值，其再現性比經ECC修正的TLD-100H佳，但OSLD經照射、計讀週期10次之再現性卻比TLD-100H差，（3）在500 mSv等價劑量以下，OSLD及TLD-100H的劑量與發光量之線性關係良好，（4）OSLD的光子能量依持性較TLD-100H大，尤其在中低光子能量時更為顯著，（5）無論垂直或水平方向，OSLD 於不同入射角度照射後之角度依持性皆比TLD-100H略小，（6） OSLD與TLD-100H於30天內之消光率皆不顯著。
並列摘要
Owing to the progress of crystalized techniques, a new luminescent material of aluminum oxide doped with carbon (Al2O3:C) was developed successfully. The optically stimulated luminescent dosimeter (OSLD) possesses several advantages such as stimulated by light, fast readout, wide dose range of detectable, high sensitivity and re-estimation of radiation. This research studied and compared the radiation detection characteristics of InLight nanoDot^TM OSLD and TLD-LiF:Mg.Cu,P (TLD-100H). The radiation characteristics studied in this research include batch variance, reproducibility, linearity of radiation dose and stimulated light, photon energy dependence, angular dependence and fading effect etc..The results of this research revealed that OSLD possesses better radiation characteristics in batch variance. The response reproducibility of OSLD is better than that of TLD-100H. The linearity of both OSLD and TLD-100H to radiation dose is excellent. The photon energy dependence of OSLD is higher than that of TLD-100H. OSLD shows better angular dependence than that of TLD-100H. The fading of OSLD and TLD-100H are insignificant within 30 days.This study shows that OSLD possessed excellent radiation detection characteristics as compared with that of TLD-100H. OSLD will be one of the most attractive radiation dosimeter in the application of personal, environmental and medical radiation measurement.
被引用紀錄
延伸閱讀
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