Synchrotron-based Fourier-transform far-infrared spectroscopy

Olivier Pirali
Last updated on Jun 12, 2021
exp soleil labastro
Olivier Pirali
Olivier Pirali
Director of Research

My research interests includes high resolution molecular spectroscopy, laboratory astrophysics, and THz generation.

Publications

Insights into the molecular structure and infrared spectrum of the prebiotic species aminoacetonitrile
We report a thorough spectroscopic and structural characterization of aminoacetonitrile.
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Insights into the molecular structure and infrared spectrum of the prebiotic species aminoacetonitrile
The bending of C$_3$: Experimentally probing the $l$-type doubling and resonance
We report a joint rovibronic and rovibrational study of C3.
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The bending of C$_3$: Experimentally probing the $l$-type doubling and resonance
Synchrotron-based far-infrared spectroscopy of HC$_3$N: Extended ro-vibrational analysis and new line list up to 3360 cm$^{−1}$
We report a joint pure rotational and ro-vibrational investigation of the lowest energy vibrational states of HC$_3$N.
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Synchrotron-based far-infrared spectroscopy of HC$_3$N: Extended ro-vibrational analysis and new line list up to 3360 cm$^{−1}$
The eight lowest-energy vibrational states of benzonitrile: analysis of Coriolis and Darling-Dennison couplings by millimeter-wave and far-infrared spectroscopy
We report a joint pure rotational and ro-vibrational investigation of the lowest energy vibrational states of benzonitrile.
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The eight lowest-energy vibrational states of benzonitrile: analysis of Coriolis and Darling-Dennison couplings by millimeter-wave and far-infrared spectroscopy
Intramolecular H-bond dynamics of catechol investigated by THz high-resolution spectroscopy of its low-frequency modes
We report an investigation of the catechol molecule from the millimeter-wave to the far-infrared domain.
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Intramolecular H-bond dynamics of catechol investigated by THz high-resolution spectroscopy of its low-frequency modes
The foreign-continuum absorption of water vapour in the far-infrared (50-500 cm$^{-1}$)
We investigated the continuum absorption of water vapour diluted in nitrogen, oxygen and air in the range of the pure rotational band …
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SOLEIL and ALMA views on prototypical organic nitriles: C$_2$H$_5$CN
The high resolution vibrational spectrum of ethyl cyanide (C2H5CN) has been investigated in the far-IR using synchrotron-based Fourier transform spectroscopy enabling the spectral assignment of the four lowest fundamental vibrations.
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SOLEIL and ALMA views on prototypical organic nitriles: C$_2$H$_5$CN
Extensive ro-vibrational analysis of deuterated-cyanoacetylene (DC$_3$N) from millimeter-wavelengths to the infrared domain
We report an extensive spectroscopic characterization of DC3N to date, from the millimeter domain to the infrared region.
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Far-infrared laboratory spectroscopy of aminoacetonitrile and first interstellar detection of its vibrationally excited transitions
We report the laboratory far-infrared investigation of aminoacetonitrile ro-vibrational spectrum and the interstellar detection of the molecule in its $v_{11} = 1$ and $v_{18} = 1$ vibrational states toward Sgr B2(N1), in addition to emission from its vibrational ground state
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The far-infrared spectrum of $^{18}$O enriched water vapour (40-700 cm$^{-1}$)
The rotational spectrum of water vapour highly enriched in 180 has been studied by high resolution (approximate to 0.001 cm-1) Fourier …
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Measurement and temperature dependence of the water vapor self-continuum between 70 and 700 cm$^{-1}$
We present new measurements and analysis of the water absorption spectra in the region of the rotational band, between 70 and 700 cm-1. …
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The NH$_2$ scissors band of methylamine
For the first time the $\nu_4$ NH2 scissors band has been assigned in a high-resolution infrared spectrum. A rotationally resolved …
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The O$_2$ far-infrared absorption spectrum between 50 and 170 cm$^{-1}$
The oxygen absorption spectrum in the 50-170 cm-1 spectral range is studied at the AILES beam line of the SOLEIL synchrotron with a …
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First detection of NHD and ND$_2$ in the interstellar medium - Amidogen deuteration in IRAS 16293-2422
We report the first detection of interstellar NHD and ND2. Both species are observed in absorption against the continuum of the protostar. From the analysis of their hyperfine structure, accurate excitation temperature and column density values are determined.
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Submillimeter and Far-infrared Spectroscopy of Monodeuterated Amidogen Radical (NHD): Improved Rest Frequencies for Astrophysical Observations
The rotational spectrum of NHD has thoroughly been re-investigated from the submm region to the FIR.
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Synchrotron-Based High Resolution Far-Infrared Spectroscopy of trans-Butadiene
We report the re-investigation of $trans$-butadiene far-infrared spectrum, at temperatures ranging from 50 to 340 K.
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Synchrotron-Based High Resolution Far-Infrared Spectroscopy of trans-Butadiene
Jet-cooled rovibrational spectroscopy of methoxyphenols using two complementary FTIR and QCL based spectrometers
Methoxyphenols (MP) are a significant component of biomass burning emissions which mainly exists in our atmosphere in the gas phase …
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The torsional fundamental band and high-$J$ rotational spectra of the ground, first and second excited torsional states of acetone
We present a new global study of the millimeter, submillimeter and far-infrared (FIR) spectra involving the three lowest torsional …
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Far-infrared spectroscopy of heavy protonated noble gas species using synchrotron radiation
In this work, we report new absorption spectra of protonated noble gas species ArH+, KrH+ and XeH+. Both pure rotation transitions and …
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Far-infrared self-continuum absorption of H$_2^{16}$O and H$_2^{18}$O (15-500 cm$^{-1}$)
The water vapor continuum absorption is studied in a spectral range covering most of the pure rotational spectrum of water molecule up …
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Far infrared measurements of absorptions by CH$_4 +$ CO$_2$ and H$_2 +$ CO$_2$ mixtures and implications for greenhouse warming on early Mars
We present an experimental study of the absorption, between 40 and 640 cm-1, by CO2, CH4 and H2 gases as well as by H2 + CO2 and CH4 + …
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The structural determination and skeletal ring modes of tetrahydropyran
A high-resolution molecular spectroscopy study was carried out on the cyclic ether tetrahydropyran (THP), one of the smallest molecules …
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Extended measurements and an experimental accuracy effective Hamiltonian model for the $3\nu_2$ and $\nu_4+\nu_2$ states of ammonia
The infrared spectrum of ammonia has proven to be highly problematic for effective Hamiltonian analysis. The most complete previous …
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Pure rotation spectrum of CF$_4$ in the $v_3=1$ state using THz synchrotron radiation
Spherical-top tetrahedral species like CH4, SiH4, CF4,… possess no permanent dipole moment. Therefore, probing their pure …
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