基于MCNP模擬和實驗的1×1英寸的LaBr3(Ce)閃爍體探測器的特性研究
發(fā)布時間：2025-02-07 16:41
在核物理中,伽馬探測技術被廣泛應用于伽馬光譜學中。閃爍體探測器廣泛應用于醫(yī)療、工業(yè)、能源和環(huán)境等領域,其中Nal(T1)閃爍體探測器在過去的50年中得到了廣泛的應用。最近,新的鑭系閃爍體特別是LaBr3(Ce)閃爍體因其高的發(fā)光效率及快的響應時間成為新型輻射探測材料的研究熱點。本論文主要采用理論模擬及實驗研究的方法,建立LaBr3(Ce)閃爍體探測器,計算半高寬(FWHM)、能量分辨率、γ能譜的全能峰效率等性能參數(shù)�；诿商乜_(MCNP)中探測器模型,采用F8來記錄探測器中產生的脈沖的能量沉積。當入射伽馬射線進入探測器時,由于相互作用,在探測器體積內產生短脈沖。我們獲得了各種伽馬源的脈沖高度譜,可用于計算研究所需要的不同閃爍體的性質。同時,在模擬中,研究了源到探測器表面的距離以研究探測距離對閃爍體探測器的閃爍特性的影響。當使用137Cs(662keV)源時,LaBr3(Ce)閃爍體探測晶體的能量分辨率為3.455%,FWHM為22.81keV。隨著入射γ射線能量的增加,閃爍體探測器的FWHM隨之增大,而LaBr3(Ce)閃爍體探測器的能量分辨率和絕對探測效率降低。同時我們也從實驗上研究...
【文章頁數(shù)】：55 頁
【學位級別】：碩士
【文章目錄】：
摘要
Abstract
Chapter 1. Introduction
1.1 Literature Review
1.2 General Properties of Scintillation Detectors
1.2.1 Full Width at Half Maximum
1.2.2 Energy resolution
1.2.3 Absolute Detection efficiency
1.3 Photon Interaction Theory
1.3.1 Photoelectric effect
1.3.2 Compton Scattering
1.3.3 Pair Production
1.4 Research Objective
1.5 Research Methodology
1.6 Thesis Outline
Chapter 2. Introduction to MCNP Code
2.1 Introduction
2.2 Input File of MCNP Code
2.2.1 Cell Card Section
2.2.2 Surface Card Section
2.2.3 Data Card Section
2.3 Summary
Chapter 3. Experimental setup and Simulation Model
3.1 Experimental setup
3.2 Crystal Package
3.2.1 Basic Packaged Scintillator
3.2.2 Integrally Mounted Scintillator/Light-sensing Device Assembly
3.3 Photomultiplier Tube
3.4 Energy Linearity of PM Tube
3.5 Gamma Energy Peak
3.6 Energy Calibration
3.7 Multichannel analyzer
3.7.1 PHA Mode
3.7.2 MCS Mode
3.8 MCNP Simulation
3.9 Summary
Chapter 4. Results and Discussion
4.1 Pulse Height spectrum
4.2 Energy Calibration
4.3 Calculation of GEB Parameters
4.4 Scintillation Properties of Scintillation Detector
4.4.1 Full width at half maximum
4.4.2 Energy resolution
4.4.3 Full energy peak absolute detection efficiency
4.5 Summary
Chapter 5. Conclusion
References
Publications During Postgraduate Study
Acknowledgements
About the Author
本文編號：4031004
【文章頁數(shù)】：55 頁
【學位級別】：碩士
【文章目錄】：
摘要
Abstract
Chapter 1. Introduction
1.1 Literature Review
1.2 General Properties of Scintillation Detectors
1.2.1 Full Width at Half Maximum
1.2.2 Energy resolution
1.2.3 Absolute Detection efficiency
1.3 Photon Interaction Theory
1.3.1 Photoelectric effect
1.3.2 Compton Scattering
1.3.3 Pair Production
1.4 Research Objective
1.5 Research Methodology
1.6 Thesis Outline
Chapter 2. Introduction to MCNP Code
2.1 Introduction
2.2 Input File of MCNP Code
2.2.1 Cell Card Section
2.2.2 Surface Card Section
2.2.3 Data Card Section
2.3 Summary
Chapter 3. Experimental setup and Simulation Model
3.1 Experimental setup
3.2 Crystal Package
3.2.1 Basic Packaged Scintillator
3.2.2 Integrally Mounted Scintillator/Light-sensing Device Assembly
3.3 Photomultiplier Tube
3.4 Energy Linearity of PM Tube
3.5 Gamma Energy Peak
3.6 Energy Calibration
3.7 Multichannel analyzer
3.7.1 PHA Mode
3.7.2 MCS Mode
3.8 MCNP Simulation
3.9 Summary
Chapter 4. Results and Discussion
4.1 Pulse Height spectrum
4.2 Energy Calibration
4.3 Calculation of GEB Parameters
4.4 Scintillation Properties of Scintillation Detector
4.4.1 Full width at half maximum
4.4.2 Energy resolution
4.4.3 Full energy peak absolute detection efficiency
4.5 Summary
Chapter 5. Conclusion
References
Publications During Postgraduate Study
Acknowledgements
About the Author
本文編號：4031004
本文鏈接：http://www.lk138.cn/projectlw/hkxlw/4031004.html
上一篇：硼中子俘獲療法在醫(yī)療船上的應用與可行性設計研究
下一篇：沒有了
下一篇：沒有了
最近更新
教材專著
