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CsI∶Tl晶体对高能X光照射量的响应关系研究
引用本文:江孝国,王伟,吴建华,王婉丽.CsI∶Tl晶体对高能X光照射量的响应关系研究[J].光学学报,2005,25(10):1429-1432.
作者姓名:江孝国  王伟  吴建华  王婉丽
作者单位:中国工程物理研究院流体物理研究所 绵阳621900 (江孝国,王伟,吴建华),中国工程物理研究院流体物理研究所 绵阳621900(王婉丽)
摘    要:在X光探伤系统中使用效率较高的CsI∶Tl晶体作为X光转换体。CsI∶Tl晶体对X光的响应关系是精密图像处理、定量测量所需的一项重要参量,理论上已经推导了CsI∶Tl晶体对X光的响应呈现线性关系,并针对性地设计了在60Co放射源上的定量测量实验,所获数据不仅充分证明了理论推导的正确性,还证明了相应系统的这种线性关系的线性度非常好。

关 键 词:X射线光学  CsI∶Tl晶体  赫特德里菲尔德曲线  CCD  60Co  线性度
收稿时间:2004/11/17

Study on the Response Characteristic of CsI∶Tl Crystal to High-Energy X-Ray Radiation
Jiang Xiaoguo Wang Wei Wu Jianhua Wang Wanli.Study on the Response Characteristic of CsI∶Tl Crystal to High-Energy X-Ray Radiation[J].Acta Optica Sinica,2005,25(10):1429-1432.
Authors:Jiang Xiaoguo Wang Wei Wu Jianhua Wang Wanli
Abstract:High efficiency CsI∶Tl crystal is used as X-ray converter in the detection system. The response characteristic of CsI∶Tl crystal to X-ray is very important in precision image processing. It is difficult to obtain a stabile H-D curve of X-ray film because of some uncontrollable factors in its processing. The response of CsI∶Tl crystal to X-ray has been theoretically proved to be linear. Some experiments on the 60Co X-ray source are performed to prove the linear of the response and the quantificational H-D curves of the CsI∶Tl crystal with different width are obtained. These H-D curves definitely show that the response is linear and that the linearity is very good. The linearity of less 0.15% is obtained from the experiment. This solves some unconquerable problems such as obtaining a stable, repetitive H-D curve which have existed for a long time in a X-ray film system.
Keywords:X-ray optics  CsI∶Tl crystal  Hutter-Driffield curve  CCD  60CO  linearity
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