Pure Rotation Spectrum of NNO in the Far Infrared Region

1990 ◽  
Vol 45 (6) ◽  
pp. 837-838 ◽  
Author(s):  
Koichi M. T. Yamada
Keyword(s):  
Vibrational State ◽  
Far Infrared ◽  
Infrared Region ◽  
Submillimeter Wave ◽  
Fourier Transform Spectrometer ◽  
Rotational Spectrum ◽  
Precise Data ◽  
Pure Rotation ◽  
Least Squares Fit ◽  
Rotation Spectrum

AbstractThe pure rotational spectrum of NNO has been observed as an impurity in the NO spectrum which has been recorded with a high resolution Fourier transform spectrometer. The observed high-J transitions in the ground vibrational state were analyzed by a least-squares fit together with the available millimeter and submillimeter wave data. It has been proved that the highly precise data of Maki et al. [3] can be used as a wavenumber standard for the far infrared.

The far-infrared spectrum of hydrogen sulfide. The (000) rotational constants of , , and

1983 ◽  
Vol 61 (10) ◽  
pp. 1462-1473 ◽  
Author(s):  
J.-M. Flaud ◽  
C. Camy-Peyret ◽  
J. W. C. Johns
Keyword(s):  
Hydrogen Sulfide ◽  
Signal To Noise Ratio ◽  
Far Infrared ◽  
Infrared Region ◽  
Rotational Constants ◽  
Pure Rotation ◽  
Isotopic Species ◽  
Least Squares Fit ◽  
Rotational Transitions ◽  
Good Signal

The pure rotation spectrum of hydrogen sulfide has been recorded between 50 and 320 cm−1 with a Fourier transform spectrometer at an apodized resolution of 0.005 cm−1. This high resolution and a good signal-to-noise ratio lead to a significant improvement in the accuracy of the wavenumbers of the rotational transitions of the three isotopic species [Formula: see text], [Formula: see text], and [Formula: see text] that were observed in natural abundance. These rotational transitions, together with the available microwave data, have been included in a least squares fit leading to the determination of precise rotational constants for each isotopic species. Finally, these constants have been used to calculate precisely the absorption of natural hydrogen sulfide in the far-infrared region of the spectrum.

scholarly journals The Submillimeter-wave Spectrum of the Formaldehyde Isotopomer H2C18O in its Ground Vibrational State

2000 ◽  
Vol 55 (5) ◽  
pp. 486-490 ◽  
Author(s):  
Holger S. P. Müller ◽  
Ralf Gendriesch ◽  
Frank Lewen ◽  
Gisbert Winnewisser
Keyword(s):  
Ground State ◽  
Vibrational State ◽  
Wave Spectrum ◽  
Far Infrared ◽  
Submillimeter Wave ◽  
Spectroscopic Constants ◽  
Published Data ◽  
Rotational Spectrum ◽  
Natural Isotopic Composition ◽  
Ground Vibrational State

Abstract The ground state rotational spectrum of H2C18O has been studied between 485 and 835 GHz with a sample of natural isotopic composition. Additional lines have been recorded around 130 GHz and near 1.85 THz, using a recently developed far-infrared laser-sideband spectrometer. The accurate new line frequencies were fit together with previously published data to obtain greatly improved spectroscopic constants. Both Watson's S and A reduced Hamiltonians have been employed yielding the rotational constants AA = 281 961.215 (82), BA = 36 902.275 51 (36), CA = 32 513.405 89 (36), AA = 281 961.371 (82), BA = 36 904.173 32 (91), and CA = 32 511.524 65 (86) MHz, respectively.

The Rotational Spectrum of CHF3 in the Submillimeter-Wave and Far-Infrared Region: Observation of the K = 3 Line Splitting

1994 ◽  
Vol 163 (2) ◽  
pp. 521-528 ◽  
Author(s):  
G. Cazzoli ◽  
L. Cludi ◽  
G. Cotti ◽  
L. Dore ◽  
C.D. Esposti ◽  
...  
Keyword(s):  
Far Infrared ◽  
Infrared Region ◽  
Submillimeter Wave ◽  
Rotational Spectrum ◽  
Line Splitting

Fourier transform far-infrared spectroscopy of HN2+ on the AILES beamline of synchrotron SOLEIL

2013 ◽  
Vol 91 (11) ◽  
pp. 937-940 ◽  
Author(s):  
S. Gruet ◽  
A. Morvan ◽  
O. Pirali ◽  
T. Chamaillé ◽  
E. Bouisset ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Broad Band ◽  
Far Infrared ◽  
Far Infrared Spectroscopy ◽  
Pure Rotation ◽  
Frequency Tunable ◽  
Discharge Cell ◽  
Rotation Spectrum ◽  
Far Infrared Spectra

We report the pure rotation spectrum of HN2+ as measured by Fourier transform (FT) absorption spectroscopy in the 20–40 cm−1 spectral range. The cations are produced in a liquid nitrogen cooled hollow cathode discharge cell developed on the AILES beamline of synchrotron SOLEIL. The setup was optimized by recording rotation–vibration spectra of H3+ (with the ν2 band centered at about 2521 cm−1), HN2+ (with the ν1 band centered at about 3234 cm−1), and HCO+ (with the ν1 band centered at about 3089 cm−1). Many rotation–vibration lines have been assigned for each ion and five pure rotational transitions have been detected for HN2+. These results demonstrate the feasibility of recording far-infrared spectra of cationic species using FT broad band spectroscopy associated with the bright synchrotron radiation continuum as an alternative to laser-based frequency tunable techniques.

The Pure Rotation Spectrum of HOCl in the Submillimeter-Wave Region

1995 ◽  
Vol 172 (2) ◽  
pp. 559-562 ◽  
Author(s):  
M. Bellini ◽  
P. Denatale ◽  
L. Fusina ◽  
G. Modugno
Keyword(s):  
Submillimeter Wave ◽  
Pure Rotation ◽  
Wave Region ◽  
Rotation Spectrum

Rotational Spectrum and 14N-Quadrupole Coupling Constants of Orthofluorobenzonitrile, a Microwave Fouriertransform Study

1986 ◽  
Vol 41 (7) ◽  
pp. 955-958 ◽  
Author(s):  
Olaf Böttcher ◽  
Dieter H. Sutter
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Vibrational State ◽  
Coupling Constants ◽  
Spectroscopic Constants ◽  
Fourier Transform Spectrometer ◽  
Rotational Spectrum ◽  
Frequency Range ◽  
Rotational Constants ◽  
Quadrupole Coupling

Seventyseven a-type rotational transitions of Orthofluorobenzonitrile were observed and assigned in the 8 - 25 GHz frequency range. The spectrum was recorded using the high resolution microwave Fourier transform spectrometer constructed at Kiel University. For most transitions the l4N quadrupole hfs patterns could be fully resolved. The spectroscopic constants obtained by a fit to the observed hfs-center frequencies and to the observed hfs multiplet splittings are: A = 2940.745(12) MHz, B = 1512.699(1) MHz, C = 998.633(1) MHz (rotational constants) and Χaa = - 4.114( 17) MHz, Xbb - Xcc= 0.383(34) MHz (14N quadrupole coupling constants). The rotational spectrum of a low lying vibrational state could be also assigned.

The pure rotation spectrum of HBr in the submillimeter-wave region

1991 ◽  
Vol 148 (1) ◽  
pp. 86-92 ◽  
Author(s):  
G. Di Lonardo ◽  
L. Fusina ◽  
P. De Natale ◽  
M. Inguscio ◽  
M. Prevedelli
Keyword(s):  
Submillimeter Wave ◽  
Pure Rotation ◽  
Wave Region ◽  
Rotation Spectrum
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