本文選題：增感屏　切入點(diǎn)：光子與電子耦合輸運(yùn)效率　出處：《黑龍江大學(xué)》2015年碩士論文

【摘要】：在工業(yè)探傷檢測中,選擇合適的金屬增感屏可以縮短曝光時(shí)間、提高增感效率,降低對從業(yè)人員的輻射劑量。本文主要采用蒙特卡羅方法模擬了4Me V加速器、200KeVX光機(jī)、192Ir源和60Coγ光子源的光子與電子耦合輸運(yùn)過程,選擇了原子序數(shù)低和高的兩種金屬屏,分別為銅、鉛。模擬分別得到了兩種金屬屏的電子平均能量、光子與電子耦合輸運(yùn)效率與金屬屏厚度的關(guān)系,并與實(shí)驗(yàn)結(jié)果對比,得到了在不同探傷儀的情況下,銅和鉛金屬增感屏的最佳厚度和鉛金屬屏的增感系數(shù),為探傷檢測中選擇合適的金屬屏提供了依據(jù)。在醫(yī)用X射線成像中,選擇合適的熒光增感屏能夠提高膠片的清晰度、減少動(dòng)態(tài)模糊,本文研究了可見光在熒光增感屏中的輸運(yùn)過程,運(yùn)用蒙特卡羅(MC)方法計(jì)算了出射可見光的收集效率與增感屏厚度的關(guān)系。
[Abstract]:In the industrial flaw detection, selecting the appropriate metal sensitizing screen can shorten the exposure time and improve the sensitization efficiency. In this paper, Monte Carlo method is used to simulate the photon electron coupling transport process of the 4Me V accelerator 200KeV X-ray machine and the 60Co 緯 photon source. Two kinds of metal screens with low atomic number and high atomic number are selected. The electron average energy, photon and electron coupling transport efficiency and the thickness of the metal screen are obtained by simulation. The results are compared with the experimental results, and the results of different flaw detectors are obtained. The optimum thickness of copper and lead metal sensitizer screen and the enhancement coefficient of lead metal screen provide the basis for selecting the appropriate metal screen in flaw detection. In medical X-ray imaging, choosing the appropriate fluorescent sensitizing screen can improve the clarity of film. In order to reduce the dynamic ambiguity, the transport process of visible light in the fluorescent sensitizing screen is studied. The relationship between the collection efficiency of visible light and the thickness of the screen is calculated by Monte Carlo method.
【學(xué)位授予單位】：黑龍江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG115.28

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 吳沭新，錢永庚，王經(jīng)瑾;用MonteCarlo方法模擬設(shè)計(jì)工業(yè)CT探測器[J];核電子學(xué)與探測技術(shù);1996年05期

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本文編號(hào)：1668108