| X光作用下CsI:Tl晶体的转换效率研究 |
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| 引用本文： | 江孝国,王伟,王婉丽.X光作用下CsI:Tl晶体的转换效率研究[J].强激光与粒子束,2005,17(2):203-205. |
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| 作者姓名： | 江孝国 王伟 王婉丽 |
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| 作者单位： | 1.中国工程物理研究院 流体物理研究所,四川 绵阳 621 900 |
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| 基金项目： | 国防科技基础研究基金资助课题 |
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| 摘 要： | X光转换材料在数字辐射成像系统中具有很重要的作用，它的效率对整个系统的量子探测效率起到决定性的作用。对CsI∶Tl晶体在X光激发下的发光效率进行详细分析，根据X光在物质中的衰减和吸收规律，从理论上推导了其对X光转换效率的关系，并建立了利用CCD相机作接收系统时的图像数据的表达形式，表明该系统输出与入射X光照射量成线性关系；并在30 MeV射频加速器上进行了实验验证。
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| 关 键 词： | 发光效率 量子探测效率 X光转换材料 线性响应 |
| 文章编号： | 1001-4322(2005)02-0203-03 |
| 收稿时间： | 2004/4/26 |
| 修稿时间： | 2004年4月26日 |
Conversion efficiency of the CsI: TI crystal excited by X-ray |
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| JIANG Xiao-guo,WANG Wei,WANG Wan-li.Conversion efficiency of the CsI: TI crystal excited by X-ray[J].High Power Laser and Particle Beams,2005,17(2):203-205. |
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| Authors: | JIANG Xiao-guo WANG Wei WANG Wan-li |
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| Institution: | 1.Institute of Fluid Physics,ＣＡＥＰ,P.O.Box 919-106,Mianyang 621900,China |
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| Abstract: | The X-ray conversion material in radiophotography system plays a very important role. Its efficiency is a crucial factor to improve the system QDE(quantum detection efficiency). The luminescent efficiency of CsI∶Tl crystal excited by X-ray is analyzed in detail and the efficiency formula of the system adopting CCD camera,CsI∶Tl crystal is derived. The formula shows that the output of such a radiophotography system is proportional to the irradiation flux of incident X-ray. The QDE of such a system can be easily improved by changing the CsI∶Tl crystal thickness. Some experimental data obtained from a 30MeV electron linear accelerator are given to prove the linear relationship. |
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| Keywords: | Luminescent efficiency Quantum detection efficiency X-ray conversion material Linear response |
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