远红外激光磁共振光谱技术及对含碳自由基分子的观测  

Observation of Carbon-bear Free Radicals Using Far Infrared Laser Magnetic Resonance Spectroscopy

作　　者：黄光明[1] 石丽华[1] 蔡欣[1] 刘煜炎[2] 

机构地区：[1]华中师范大学物理系 [2]华东师范大学物理系,上海200062

出　　处：《光谱学与光谱分析》2003年第3期454-457,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (No 1 0 1 740 2 0 );九五攀登计划资助项目

摘　　要：本文报道国内建成的远红外激光磁共振 (FIRLMR)光谱仪的技术特点和工作原理。该谱仪采用CO2 激光横向泵浦远红外激光 ,样品吸收池置于远红外激光谐振腔内 ,由聚丙烯薄膜与远红外激光增益池隔开以获得很高的灵敏度 ,从而对寿命很短的自由基分子进行研究。利用该光谱仪在远红外波段测量得到了多个瞬态自由基分子CCH ,CF和CH2 的光谱 ,这些自由基分子由微波放电产生的氟原子与甲烷CH4 反应生成。The principle and technical characters of far infrared laser magnetic resonance (FIRLMR) spectrometer built up in-China are introduced. A CO2 transversely pumped far infrared laser is adopted. In order to obtain high sensitivity, the sample absorption cell is placed in the FIR laser cavity and separated from laser gain cavity with thin polypropylene film. The spectrometer can be employed to study short lived free redicals. The spectra of many transient free redicals including CCH, CF and CH2 have been detected by the spectrometer. These transients are generated by mixing CH4 with the fluorine atoms produced with microwave discharge.

关 键 词：远红外激光磁共振光谱技术 含碳自由基分子 观测 激光光谱 光谱仪 

分 类 号：O657.38[理学—分析化学]