title: [Observation of carbon-bear free radicals using far infrared laser magnetic resonance spectroscopy].
abstract: 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 radicals. The spectra of many transient free radicals 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.
authors.affiliation: Department of Physics, Central China Normal University, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, China.
authors.forename: Guang-ming
authors.initials: GM
authors.lastname: Huang
authors.forename: Li-hua
authors.initials: LH
authors.lastname: Shi
authors.forename: Xin
authors.initials: X
authors.lastname: Cai
authors.forename: Yu-yan
authors.initials: YY
authors.lastname: Liu
mesh_terms: D002244:Carbon / Q000737:chemistry; D002245:Carbon Dioxide; D004578:Electron Spin Resonance Spectroscopy / Q000295:instrumentation / Q000379:methods*; D005609:Free Radicals / Q000737:chemistry; D007834:Lasers; D019265:Spectroscopy, Near-Infrared / Q000295:instrumentation / Q000379:methods*; D014732:Vibration
chemical_list: D005609:Free Radicals; D002245:Carbon Dioxide; D002244:Carbon