Observation and analysis of optical free induction decay in the CH3F ν4 band
| Autor: | Yuki Miyamoto, Kentarou Kawaguchi, Jian Tang, Yusuke Okabayashi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Lorentz transformation Far-infrared laser General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Free induction decay symbols.namesake Transverse plane Decay time Fourier transform Torr symbols Physical and Theoretical Chemistry Atomic physics 0210 nano-technology |
| Zdroj: | Chemical Physics Letters. 692:106-110 |
| ISSN: | 0009-2614 |
| Popis: | Optical free induction decay (FID) signals of the CH3F ν4 band were observed by using a cw-OPO infrared laser coupled with a Stark switching method. The observed signals have been Fourier transformed to obtain the Lorentz functions and the widths have been analyzed to determine the pressure-broadening coefficients for rR(0,0), rQ(1,0), rR(1,0), rR(1,1), and pP(2,1) to be 1/(πT2 p) = (46.1 ± 2.1), (31.6 ± 3.6), (21.8 ± 2.5), (25.2 ± 4.0), and (26.5 ± 1.8) MHz/Torr, where T2 is the transverse decay time. The value of rR(0,0) is larger than that determined from a recent pressure-broadening measurement by 39 ± 12%. The difference is explained by collision induced reorienting transitions (ΔM = ±1, ΔJ = 0). |
| Databáze: | OpenAIRE |
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