The antisymmetric stretching fundamental band of free MgD2

2004 ◽  
Vol 82 (6) ◽  
pp. 947-950 ◽  
Author(s):  
Alireza Shayesteh ◽  
Dominique RT Appadoo ◽  
Iouli Gordon ◽  
Peter F Bernath
Keyword(s):  
Fourier Transform ◽  
Emission Spectrum ◽  
Electrical Discharge ◽  
Bond Distance ◽  
Infrared Emission ◽  
Fourier Transform Spectrometer ◽  
High Temperature Furnace ◽  
Vibration Rotation ◽  
First Time ◽  
Temperature Furnace

The gaseous MgD2 molecule has been synthesized for the first time in an electrical discharge inside a high-temperature furnace. The high-resolution infrared emission spectrum of MgD2 was recorded with a Fourier transform spectrometer, and the antisymmetric stretching mode (v3) was detected near 1176.5 cm–1. The v3 band was rotationally analyzed, and the r0 Mg—D bond distance was determined to be 1.700 874(8) Å.Key words: gaseous MgD2, vibration-rotation emission spectrum, Mg-D bond distance.

The infrared spectrum of CS

1984 ◽  
Vol 62 (12) ◽  
pp. 1414-1419 ◽  
Author(s):  
R. J. Winkel Jr. ◽  
Sumner P. Davis ◽  
Rubén Pecyner ◽  
James W. Brault
Keyword(s):  
Fourier Transform ◽  
Infrared Emission ◽  
Solar Observatory ◽  
Band Head ◽  
The Other ◽  
Fourier Transform Spectrometer ◽  
National Solar Observatory ◽  
Carbon Monosulfide ◽  
Vibration Rotation ◽  
The Fourier Transform

The infrared emission spectrum of carbon monosulfide was observed as a sequence of vibration–rotation bands in the X1Σ+ state, with strong heads of the Δν = 2 sequence degraded to the red. Eight bands of 12C32S were identified, and bands corresponding to the isotope 12C34S were also observed. The most prominent band head, that of the (2–0) band, is at 2585 cm−1, with the other heads spaced approximately 26 cm−1 to smaller wavenumbers. Our data, taken with the Fourier transform spectrometer at the National Solar Observatory (Kitt Peak) include the first reported laboratory observations of the band heads and as many as 200 lines in each band. These observations allowed the calculation of vibrational and rotational constants to higher order than previously reported.

Lambda doubling in the infrared spectrum of SH

1984 ◽  
Vol 62 (12) ◽  
pp. 1420-1425 ◽  
Author(s):  
R. J. Winkel Jr. ◽  
Sumner P. Davis
Keyword(s):  
Fourier Transform ◽  
Infrared Spectrum ◽  
Ground State ◽  
Solar Observatory ◽  
Fourier Transform Spectrometer ◽  
Multiplet Splitting ◽  
National Solar Observatory ◽  
Vibration Rotation ◽  
The Fourier Transform ◽  
First Time

The (1–0), (2–1), and (3–2) infrared vibration–rotation bands of the X2Π ground state of sulfur monohydride were observed in emission from a furnace. Multiplet splitting produces two subbands, each of which exhibits lambda splitting. The band heads were observed for the first time, 285 lines were measured, and a calculation of lambda-doubling parameters was made. The spectrum was recorded using the Fourier transform spectrometer at the National Solar Observatory (Kitt Peak).

High-resolution infrared emission spectrum of InF

1994 ◽  
Vol 72 (11-12) ◽  
pp. 1213-1217 ◽  
Author(s):  
T. Karkanis ◽  
M. Dulick ◽  
Z. Morbi ◽  
J. B. White ◽  
P. F. Bernath
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Emission Spectrum ◽  
Ground State ◽  
Infrared Emission ◽  
Fourier Transform Spectrometer

A high-resolution infrared emission spectrum of InF was recorded with a Fourier transform spectrometer. A total of 2664 rotational lines from ν = 1 → 0 to ν = 12 → 11 were measured for the major isotopomer 115InF and 179 lines for ν = 1 → 0 and ν = 2 → 1 for the minor isotope 113InF in the X1Σ+ ground state. Revised Dunham Yij constants for each isotopomer as well as isotopically invariant Dunham Uij constants are reported. Also, an effective Born–Oppenheimer potential was determined by fitting the data directly to the eigenvalues of a parameterized potential.

scholarly journals Fourier transform spectrometer measurements of column CO<sub>2</sub> at Sodankylä, Finland

2016 ◽  
Vol 5 (2) ◽  
pp. 271-279 ◽  
Author(s):  
Rigel Kivi ◽  
Pauli Heikkinen
Keyword(s):  
Time Series ◽  
Fourier Transform ◽  
Data Processing ◽  
Greenhouse Gases ◽  
Growing Season ◽  
Total Carbon ◽  
Fourier Transform Spectrometer ◽  
Annual Variability ◽  
Time Period ◽  
First Time

Abstract. Fourier transform spectrometer (FTS) observations at Sodankylä, Finland (67.4° N, 26.6° E) have been performed since early 2009. The FTS instrument is participating in the Total Carbon Column Observing Network (TCCON) and has been optimized to measure abundances of the key greenhouse gases in the atmosphere. Sodankylä is the only TCCON station in the Fennoscandia region. Here we report the measured CO2 time series over a 7-year period (2009–2015) and provide a description of the FTS system and data processing at Sodankylä. We find the lowest monthly column CO2 values in August and the highest monthly values during the February–May season. Inter-annual variability is the highest in the June–September period, which correlates with the growing season. During the time period of FTS measurements from 2009 to 2015, we have observed a 2.2 ± 0.2 ppm increase per year in column CO2. The monthly mean column CO2 values have exceeded 400 ppm level for the first time in February 2014.

The infrared spectrum of HNO

1983 ◽  
Vol 61 (7) ◽  
pp. 1106-1119 ◽  
Author(s):  
J. W. C. Johns ◽  
A. R. W. McKellar ◽  
E. Weinberger
Keyword(s):  
Fourier Transform ◽  
Infrared Spectrum ◽  
Flow System ◽  
Fourier Transform Spectrometer ◽  
Hydrogen Deuterium ◽  
Vibration Rotation

Vibration–rotation spectra of HNO (DNO) have been observed in a flow system following the reaction of hydrogen (deuterium) atoms with NO. The spectra were recorded at approximately Doppler limited resolution with a large Fourier transform spectrometer. Complete analyses have been made of the ν1 bands of HNO and DNO with the following results (in cm−1).[Formula: see text]Spectra of ν2 (NO stretching) were also observed in both HNO and DNO, but ν3 (bending) proved too weak to be detected in either molecule.

scholarly journals FTS measurements of column CO<sub>2</sub> at Sodankylä

2016 ◽  
Author(s):  
R. Kivi ◽  
P. Heikkinen
Keyword(s):  
Time Series ◽  
Fourier Transform ◽  
Data Processing ◽  
Greenhouse Gases ◽  
Growing Season ◽  
Total Carbon ◽  
Fourier Transform Spectrometer ◽  
Time Period ◽  
First Time ◽  
Ppm Level

Abstract. Fourier Transform Spectrometer (FTS) observations at Sodankylä have been per formed since early 2009. The FTS instrument is participating in the Total Carbon Column Observing Network (TCCON) and has been optimized to measure abundances of the key greenhouse gases in the atmosphere. Here we report the measured CO2 time series over a six year period (2009–2014) and provide a description of the FTS system and data processing at Sodankylä. We find the lowest monthly column CO2 values in August and the highest monthly values during the February to May season. Inter-annual variability is the highest in June–September period, which correlates with the growing season. During the time period of FTS measurements from 2009 until 2014 we have observed a 2.4 &amp;pm; 0.3 ppm increase per year in column CO2. The monthly mean column CO2 values have exceeded 400 ppm level for the first time in February 2014.

THE NEAR INFRARED SPECTRUM OF THE NIGHT AIRGLOW OBSERVED FROM HIGH ALTITUDE

1964 ◽  
Vol 42 (6) ◽  
pp. 1037-1045 ◽  
Author(s):  
H. P. Gush ◽  
H. L. Buijs
Keyword(s):  
Infrared Spectrum ◽  
Emission Spectrum ◽  
High Altitude ◽  
Electronic Transition ◽  
Near Infrared ◽  
Michelson Interferometer ◽  
Infrared Emission ◽  
Upper Atmosphere ◽  
Transition Formula ◽  
First Time

The infrared emission spectrum of the upper atmosphere between 1.2 and 2.5 microns has been measured at night by means of a Michelson interferometer carried to an altitude of 90,000 feet by a balloon. The complete Δν = 2 sequence of rotation–vibration OH bands has been observed at a resolution sufficient to resolve the rotational structure. The (0, 0) band of the electronic transition [Formula: see text] of oxygen at 1.27 microns has been observed in the night-sky spectrum for the first time. Its brightness is comparable with that of the (4, 2) OH band at 1.6 microns.

Infrared Emission Spectroscopy of Coal Minerals and Their Thermal Transformations

1992 ◽  
Vol 46 (1) ◽  
pp. 73-78 ◽  
Author(s):  
A. M. Vassallo ◽  
P. A. Cole-Clarke ◽  
L. S. K. Pang ◽  
A. J. Palmisano
Keyword(s):  
Fourier Transform ◽  
Emission Spectrum ◽  
Atomic Absorption ◽  
Emission Spectroscopy ◽  
Graphite Furnace ◽  
Infrared Emission ◽  
Thermal Transformations ◽  
Infrared Spectrometer ◽  
Ir Emission

An infrared (IR) emission cell which is capable of operation up to 1500°C is described. The cell is based on an atomic absorption graphite furnace and is coupled to a Fourier transform infrared spectrometer. The spectrometer has been used to measure the emission spectrum of quartz from 200 to 1400°C, and the changes in the spectrum occurring with temperature can be related to the formation of cristobalite; transitions between low and high forms (alpha and beta forms) can also be monitored. Aragonite has also been analyzed through the temperature range 100 to 600°C, and the aragonite/calcite transition is clearly evident. The transformation of kaolinite to metakaolinite and through to mullite and cristobalite has also been studied with this in situ technique. The formation of mullite is evident in the spectrum at temperatures as low as 900°C, and the formation of cristobalite is clearly seen at 1200°C.

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