太赫兹时域光谱技术定量检测含能材料研究

Quantitative Detection of Typical Explosives by Terahertz Time Domain Spectroscopy

为了快速准确检测含能材料,基于大多数含能材料分子的振动和转动能级都处于0.1~3.0THz频率范围,开展了采用太赫兹时域光谱(THz-TDS)技术检测爆炸物的研究。针对3类10种典型含能材料,测试了其太赫兹吸收光谱,指认了每种含能材料特征峰,丰富了含能材料的太赫兹吸收光谱数据库;并通过线性拟合,根据硝基或分子晶格振动所致的太赫兹特征吸收峰强度,对每种含能材料建立了定量分析的方法。

Aimed at rapid and accurate detection of energetic materials or explosives,based on the reality that most energetic material molecules vibrate and rotate in the terahertz band(0.1~3.0THz),the study of using terahertz time-domain spectroscopy(THz-TDS)detection technology to the detection of explosives was carried out.The terahertz absorption spectra of ten kinds of typical energetic materials were tested,and the characteristic peaks of each explosive were identified,which enriched the terahertz database of energetic materials.Additionally,the linear fitting between the terahertz absorption intensity and the mass of energetic material was also carried out.As a result,the quantitative analysis methods for energetic explosives were established,based on the intensity of terahertz characteristic absorption peak of‒NO2 or molecular lattice vibration.