【作者】 李宁； 沈京玲； 孙金海； 梁来顺； 许晓宇； 逯美红； 贾燕；

【Author】 LI Ning SHEN Jingling SUN Jinhai LIANG Laishun XU Xiaoyu LU Meihong JIA Yan( Department of Physics, Capital Normal University, Beijing, 100037, China The First Research Institute of Ministry of Public Security of China, Beijing, 100044, China)

【机构】 首都师范大学物理系； 公安部第一研究所；

【摘要】 甲基苯丙胺,俗称冰毒,是目前最为泛滥的笨丙胺类毒品中的一种.本丈采用太赫兹时域光谱技术测量了甲基苯丙胺在太赫兹(1012Hz)波段的吸收特性,得到它在0.2—2.6THz频率范围的特征吸收谱。应用密度泛函理论,我们计算了它的振动光谱,理论计算发现1.22THz和1.67THz处吸收峰与实验上1.23THz和1.67THz处的吸收峰相对应,两个峰所对应的振动能级间隔约为1.86meV.同时对甲基苯丙胺的远红外振动模式进行了识别。对甲基苯丙胺太赫兹光谱特性的研究结果表明太赫兹技术用于毒品检测的可行性和有效性。更多还原

【Abstract】 The spectral absorption features of methamphetamine are studied experimentally by Terahertz time-domain spectroscopy technique. The vibration spectroscopy is calculated using density functional theory. Theoretical results show some good agreements with experimental results. The absorption peaks lying in 1.22THz and 1.67THz in the theoretical results are corresponding to those lying in 1.23THz and 1.67THz in the experimental results. The vibrational energy level interval between two peaks is calculated and the identification of vibrational mode is presented.更多还原