Microwave-infrared double resonance of CH4 using 3.39μ He–Ne laser line
- 1 June 1973
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 58 (11), 4908-4911
- https://doi.org/10.1063/1.1679075
Abstract
The rotational transition between the and components of the 67 v3 = 1 level of CH4 has been observed at 6895 MHz by double resonance experiments in the 3.39 μm laser cavity. When the microwave radiation is applied the Lamb dip signal is observed to decrease markedly in size because of the double resonance coherence splitting phenomenon. A double resonance signal is also observed over the Doppler width of the CH4 absorption because the population shift caused by the microwave transition reduces the saturation of the CH4 absorption by the laser. The frequency of the transition was measured as .
Keywords
This publication has 11 references indexed in Scilit:
- Observation of the inverse Lamb dip for infrared-microwave two-photon transitionsApplied Physics Letters, 1972
- Measurement and Analysis of the ν3 Band of MethaneThe Journal of Chemical Physics, 1972
- Forbidden rotational spectra of polyatomic moleculesJournal of Molecular Spectroscopy, 1972
- Precision Stark Spectroscopy of CH4 by Nonlinear Laser AbsorptionThe Journal of Chemical Physics, 1971
- Stark Effect of the Absorption Line of Methane Observed by the 3.391 µm He-Ne MaserJournal of the Physics Society Japan, 1969
- Pressure Shift and Broadening of Methane Line at 3.39Studied by Laser-Saturated Molecular AbsorptionPhysical Review Letters, 1969
- Observation of ΔJ =3 ``Forbidden'' Transition in Ethyl Iodide by the Use of Double ResonanceThe Journal of Chemical Physics, 1966
- Measurement of absolute optical collision diameters in methane using tuned-laser spectroscopyPhysics Letters, 1964
- Vibration-rotation energies of tetrahedral XY4 moleculesJournal of Molecular Spectroscopy, 1961
- The Possible Microwave Absorption in the Molecules belonging to the Point Groups D2d ≡ Vd and TdThe Journal of Chemical Physics, 1953