Development of microwave-optical double-resonance spectroscopy using a Fourier-transform microwave spectrometer and a pulsed laser
- 1 January 2002
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 73 (1), 165-171
- https://doi.org/10.1063/1.1426230
Abstract
A new type of microwave-detected microwave-optical double-resonance (MODR) spectroscopy has been developed using a Fourier-transform microwave spectrometer and a tunable pulsed dye laser. In this method, a free-induction decay (FID) signal was detected instead of the microwave (MW) absorption. To demonstrate the performance, we measured the MODR spectra of the CCS and C 4 H radicals in supersonic jets generated by a pulsed-discharge nozzle. Since the pulsed sources are employed for both the optical and microwave radiations, it is possible to control the relative timing of irradiations of the MW and optical pulses. We were able to obtain two different types of spectra; one is the ordinary population labeling spectrum, and the other is a spectrum obtained by breaking the coherence of molecules. In the latter case, more than 50% of depletion of the FID signal was observed, which is unable to be attained when noncoherent phenomena are used to detect the double-resonance signal.Keywords
This publication has 20 references indexed in Scilit:
- Microwave detected, microwave-optical double resonance of NH3, NH2D, NHD2, and ND3. II. Predissociation dynamics of the à stateThe Journal of Chemical Physics, 1995
- Microwave detected, microwave-optical double resonance of NH3, NH2D, NHD2, and ND3. I. Structure and force field of the à stateThe Journal of Chemical Physics, 1995
- PDN–FTMW spectroscopy of open-shell complexesFaraday Discussions, 1994
- Structure of C3S studied by pulsed-discharge-nozzle Fourier-transform microwave spectroscopyJournal of Molecular Spectroscopy, 1992
- Predissociation of ammonia à state studied by microwave—optical double-resonance spectroscopyChemical Physics Letters, 1990
- Spectroscopy and intramolecular dynamics of highly excited vibrational states of NH3Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics, 1988
- Laboratory detection and astronomical identification of a new free radical, CCS 3Sigma/-/The Astrophysical Journal, 1987
- Rotational structure of ammonia N–H stretch overtones: Five and six quanta bandsThe Journal of Chemical Physics, 1986
- Microwave detected, microwave–optical double resonance spectra of NO2: A test of Hardwick’s ergodicity conjectureThe Journal of Chemical Physics, 1985
- Use of microwave detected microwave-optical double resonance to assign the 6450 Å band of NH3The Journal of Chemical Physics, 1984