| 直接解调法在碲锌镉探测器γ谱分析中的应用 | |
| 艾宪芸 ; 魏义祥 ; 肖无云 ; AI Xianyun ; WEI Yixiang ; XIAO Wuyun | |
| 2010-06-10 ; 2010-06-10 | |
| 关键词 | 碲锌镉探测器 γ谱分析 直接解调法 谱形重建 cadmium zinc telluride(CZT) detector γ spectra analysis direct demodulation method spectral reconstruction. TL814 |
| 其他题名 | Direct demodulation method for γ spectra analysis detected by CZT detectors |
| 中文摘要 | 为了提高碲锌镉探测器γ谱解析的精度,将直接解调法应用于γ谱重建算法研究。γ谱的测量是谱仪系统对γ射线的调制过程,针对一维γ谱的特点建立了调制方程的响应函数矩阵,分析了本底和噪声的影响及其处理方法,对实测谱构成的单峰和重峰进行重建。结果表明,重建γ谱能量分辨率比原始测量谱提高了5~6倍,能把峰位相距一个半高宽、峰面积比100¨1的重峰完全分离,弱峰的寻峰率显著提高。直接解调法具有很强的抑制噪声能力,尤其适合在统计性较差的野外测量的能谱重建中应用。; A γ spectra reconstruction algorithm was developed using the direct demodulation method to improve γ spectra analysis precision.The γ spectra measurement process was seen as the modulation of energy spectra from radioactive isotopes by γ-ray spectrometers.The modulation equation response matrix and the influence of background and noise were incorporated into the direct demodulation analysis of single and overlapped peaks in measured γ spectra.The results show that the method improves the energy resolution of cadmium zinc telluride γ spectra 56 times.The overlapped peaks,with peak intervals of one FWHM(full width at half maximum) and peak area ratio of 100∶1,can be separated entirely.The method is insensitive to noise,so it is especially useful for reconstructing γ spectra measured with cadmium zinc telluride detectors in the field which the spectra statistics are not optional. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/63704]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 艾宪芸,魏义祥,肖无云,等. 直接解调法在碲锌镉探测器γ谱分析中的应用[J],2010, 2010. |
| APA | 艾宪芸,魏义祥,肖无云,AI Xianyun,WEI Yixiang,&XIAO Wuyun.(2010).直接解调法在碲锌镉探测器γ谱分析中的应用.. |
| MLA | 艾宪芸,et al."直接解调法在碲锌镉探测器γ谱分析中的应用".(2010). |
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