FT-jet spectroscopy: vibrational energy transfer in N2O

A set-up combining a high resolution Fourier transform interferometer and a quadrupole mass spectrometer with a supersonic jet expansion produced thanks to a large turbomolecular pumping unit is described. A rotational temperature close to 3 K is demonstrated. Vibration-vibration energy transfer in the expansion affecting the v2 = 1 state in N2O is monitored in the presence of various collision partners. The transfer from the v 2 = 1 state of N2O towards the quasi resonant, lower energy v2 = 1 state of OCS is demonstrated, in particular. © 2005 Elsevier B.V. All rights reserved.info:eu-repo/semantics/publishe

Overtone, 2OH spectroscopy of H2O[sbnd]Kr

We have used continuous-wave cavity ring-down spectroscopy to record the spectrum of H2O[sbnd]Kr in the 2OH excitation range of H2O. 11 sub-bands have been observed for the main krypton isotope, 84 Kr. Their rotational structure (Trot=18 K) is analyzed and the lines fitted together with literature microwave data, with a unitless standard deviation σ=0.86 and 1.32 for ortho and para species, respectively. 4 more sub-bands are observed for the three other isotopes and are also analyzed. The upper state vibrational predissociation lifetime is estimated to 4 ns from observed spectral linewidths.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Vibration-Rotation Analysis of the Jet-Cooled ν12, ν7+ν8 and ν6+ν10 Absorption Bands of 12C2H4

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Demonstration of cavity enhanced FTIR spectroscopy using a femtosecond laser absorption source

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FANTASIO: a versatile experimental set-up to investigate jet-cooled molecules

The design of a new apparatus, named FANTASIO, for studying jet-cooled molecules is described. It includes, around the same supersonic expansion cell, a high resolution Fourier transform spectrometer with single or multipass optics, a tunable diode laser spectrometer with optional cavity ring-down facilities, and a quadrupole mass spectrometer. Performance and operational procedures are illustrated.info:eu-repo/semantics/publishe

Cavity enhanced FTIR spectroscopy using a femto-OPO absorption source

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The Fantasio set-up: description and extension towards Femto-Fantasio

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High-resolution room temperature and jet-cooled spectroscopic investigation of 1 5NH3 in the ν1+ν3 band region (1.51 μm)

Spectra of 99% isotopically pure 15NH3 were recorded using cavity ring-down (CRD, 6567-6639 cm-1) and Fourier transform (FT, 6350-6985 cm-1) spectroscopy under jet cooled and room temperature conditions, respectively. Measured line positions on both data sets improve on literature values, in particular by one order of magnitude for the ν1+ν3 band. A room temperature list of line positions, with approximate line intensities, is provided, much more complete and precise than presently available. Line broadening effects in the CRD spectrum allowed lines with J'''- values between 0 and 3 to be identified. Ground state combination differences were used to refine the assignments, further assisted by intensity ratios between the two data sets. Reliable values for J, K and inversion symmetry of the ground state vibrational levels, as well as further information on a/s doublets could be obtained, updating and extending literature assignments.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

HIGH-RESOLUTION INFRARED SPECTROSCOPIC INVESTIGATION OF 15N-AMMONIA AROUND 1.5 MICRON

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